diff --git a/packages/flutter_markdown/CHANGELOG.md b/packages/flutter_markdown/CHANGELOG.md
index 0c9d26f..484fb46 100644
--- a/packages/flutter_markdown/CHANGELOG.md
+++ b/packages/flutter_markdown/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Fix `unnecessary_import` lint errors.
+
 ## 0.6.6
 
  * Soft line break
diff --git a/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart b/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart
index 7ced604..7721a36 100644
--- a/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart
+++ b/packages/flutter_markdown/example/lib/demos/basic_markdown_demo.dart
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
diff --git a/packages/flutter_markdown/lib/src/widget.dart b/packages/flutter_markdown/lib/src/widget.dart
index f0538ed..447adfd 100644
--- a/packages/flutter_markdown/lib/src/widget.dart
+++ b/packages/flutter_markdown/lib/src/widget.dart
@@ -4,17 +4,13 @@
 
 import 'dart:convert';
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:markdown/markdown.dart' as md;
-import 'package:meta/meta.dart';
 
 import '_functions_io.dart' if (dart.library.html) '_functions_web.dart';
-import 'builder.dart';
-import 'style_sheet.dart';
 
 /// Signature for callbacks used by [MarkdownWidget] when the user taps a link.
 /// The callback will return the link text, destination, and title from the
diff --git a/packages/flutter_markdown/test/blockquote_test.dart b/packages/flutter_markdown/test/blockquote_test.dart
index 7078914..1ded2dc 100644
--- a/packages/flutter_markdown/test/blockquote_test.dart
+++ b/packages/flutter_markdown/test/blockquote_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/image_test.dart b/packages/flutter_markdown/test/image_test.dart
index 66d6be4..f70785d 100644
--- a/packages/flutter_markdown/test/image_test.dart
+++ b/packages/flutter_markdown/test/image_test.dart
@@ -6,7 +6,6 @@
 
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 
diff --git a/packages/flutter_markdown/test/list_test.dart b/packages/flutter_markdown/test/list_test.dart
index 3e4c102..276aa3a 100644
--- a/packages/flutter_markdown/test/list_test.dart
+++ b/packages/flutter_markdown/test/list_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/style_sheet_test.dart b/packages/flutter_markdown/test/style_sheet_test.dart
index a58fe7e..3738362 100644
--- a/packages/flutter_markdown/test/style_sheet_test.dart
+++ b/packages/flutter_markdown/test/style_sheet_test.dart
@@ -4,7 +4,6 @@
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/table_test.dart b/packages/flutter_markdown/test/table_test.dart
index a20b9bd..1a17f1a 100644
--- a/packages/flutter_markdown/test/table_test.dart
+++ b/packages/flutter_markdown/test/table_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/text_alignment_test.dart b/packages/flutter_markdown/test/text_alignment_test.dart
index 4b80354..1cacb34 100644
--- a/packages/flutter_markdown/test/text_alignment_test.dart
+++ b/packages/flutter_markdown/test/text_alignment_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/text_scale_factor_test.dart b/packages/flutter_markdown/test/text_scale_factor_test.dart
index 08b1970..3710b3e 100644
--- a/packages/flutter_markdown/test/text_scale_factor_test.dart
+++ b/packages/flutter_markdown/test/text_scale_factor_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'utils.dart';
diff --git a/packages/flutter_markdown/test/text_test.dart b/packages/flutter_markdown/test/text_test.dart
index d0e76bf..eca1b6f 100644
--- a/packages/flutter_markdown/test/text_test.dart
+++ b/packages/flutter_markdown/test/text_test.dart
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:flutter_test/flutter_test.dart';
 
diff --git a/packages/flutter_markdown/test/utils.dart b/packages/flutter_markdown/test/utils.dart
index 24fe0e0..497d257 100644
--- a/packages/flutter_markdown/test/utils.dart
+++ b/packages/flutter_markdown/test/utils.dart
@@ -4,13 +4,10 @@
 
 import 'dart:convert';
 import 'dart:io' as io;
-import 'dart:typed_data';
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 final TextTheme textTheme =
diff --git a/packages/fuchsia_ctl/CHANGELOG.md b/packages/fuchsia_ctl/CHANGELOG.md
index c003cf9..86ad0bf 100644
--- a/packages/fuchsia_ctl/CHANGELOG.md
+++ b/packages/fuchsia_ctl/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+- Fix `unnecessary_import` lint errors.
+
 ## 0.0.24
 
 - Flush the content of iosink when writing output to a file.
diff --git a/packages/fuchsia_ctl/test/image_paver_test.dart b/packages/fuchsia_ctl/test/image_paver_test.dart
index 24c5e43..d57e237 100644
--- a/packages/fuchsia_ctl/test/image_paver_test.dart
+++ b/packages/fuchsia_ctl/test/image_paver_test.dart
@@ -8,10 +8,6 @@
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
 import 'package:fuchsia_ctl/fuchsia_ctl.dart';
-import 'package:fuchsia_ctl/src/image_paver.dart';
-import 'package:fuchsia_ctl/src/operation_result.dart';
-import 'package:fuchsia_ctl/src/ssh_key_manager.dart';
-import 'package:fuchsia_ctl/src/tar.dart';
 import 'package:mockito/mockito.dart';
 import 'package:process/process.dart';
 import 'package:test/test.dart';
diff --git a/packages/fuchsia_ctl/test/package_server_test.dart b/packages/fuchsia_ctl/test/package_server_test.dart
index adef383..7413292 100644
--- a/packages/fuchsia_ctl/test/package_server_test.dart
+++ b/packages/fuchsia_ctl/test/package_server_test.dart
@@ -8,8 +8,6 @@
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
 import 'package:fuchsia_ctl/fuchsia_ctl.dart';
-import 'package:fuchsia_ctl/src/operation_result.dart';
-import 'package:fuchsia_ctl/src/package_server.dart';
 import 'package:mockito/mockito.dart';
 import 'package:process/process.dart';
 import 'package:test/test.dart';
diff --git a/packages/fuchsia_ctl/test/ssh_client_test.dart b/packages/fuchsia_ctl/test/ssh_client_test.dart
index 995c77e..bb728ec 100644
--- a/packages/fuchsia_ctl/test/ssh_client_test.dart
+++ b/packages/fuchsia_ctl/test/ssh_client_test.dart
@@ -7,8 +7,6 @@
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
 import 'package:fuchsia_ctl/fuchsia_ctl.dart';
-import 'package:fuchsia_ctl/src/operation_result.dart';
-import 'package:fuchsia_ctl/src/ssh_client.dart';
 import 'package:mockito/mockito.dart';
 import 'package:process/process.dart';
 import 'package:test/test.dart';
diff --git a/packages/metrics_center/CHANGELOG.md b/packages/metrics_center/CHANGELOG.md
index bf0d250..01bd963 100644
--- a/packages/metrics_center/CHANGELOG.md
+++ b/packages/metrics_center/CHANGELOG.md
@@ -1,41 +1,47 @@
-# 1.0.1
+## NEXT
+
+- Fix `unnecessary_import` lint errors.
+- Update version titles in CHANGELOG.md so plugins tooling understands them.
+  - (Moved from `# X.Y.Z` to `## X.Y.Z`)
+
+## 1.0.1
 
 - `update` now requires taskName to scale metric writes
 
-# 1.0.0
+## 1.0.0
 
 - Null safety support
 
-# 0.1.1
+## 0.1.1
 
 - Update packages to null safe
 
-# 0.1.0
+## 0.1.0
 
 - `update` now requires DateTime when commit was merged
 - Removed `github` dependency
 
-# 0.0.9
+## 0.0.9
 
 - Remove legacy datastore and destination.
 
-# 0.0.8
+## 0.0.8
 
 - Allow tests to override LegacyFlutterDestination GCP project id.
 
-# 0.0.7
+## 0.0.7
 
 - Expose constants that were missing since 0.0.4+1.
 
-# 0.0.6
+## 0.0.6
 
 - Allow `datastoreFromCredentialsJson` to specify project id.
 
-# 0.0.5
+## 0.0.5
 
 - `FlutterDestination` writes into both Skia perf GCS and the legacy datastore.
 - `FlutterDestination.makeFromAccessToken` returns a `Future`.
 
-# 0.0.4+1
+## 0.0.4+1
 
 - Moved to the `flutter/packages` repository
diff --git a/packages/metrics_center/lib/src/skiaperf.dart b/packages/metrics_center/lib/src/skiaperf.dart
index 5a9f921..eb9cbe8 100644
--- a/packages/metrics_center/lib/src/skiaperf.dart
+++ b/packages/metrics_center/lib/src/skiaperf.dart
@@ -7,7 +7,6 @@
 import 'package:gcloud/storage.dart';
 import 'package:googleapis/storage/v1.dart' show DetailedApiRequestError;
 import 'package:googleapis_auth/auth_io.dart';
-import 'package:googleapis_auth/googleapis_auth.dart';
 
 import 'common.dart';
 import 'constants.dart';
diff --git a/packages/metrics_center/test/skiaperf_test.dart b/packages/metrics_center/test/skiaperf_test.dart
index 4c49bc4..de1a842 100644
--- a/packages/metrics_center/test/skiaperf_test.dart
+++ b/packages/metrics_center/test/skiaperf_test.dart
@@ -10,7 +10,6 @@
 import 'package:googleapis/storage/v1.dart' show DetailedApiRequestError;
 import 'package:googleapis_auth/auth_io.dart';
 import 'package:metrics_center/metrics_center.dart';
-import 'package:metrics_center/src/constants.dart';
 import 'package:metrics_center/src/gcs_lock.dart';
 import 'package:mockito/annotations.dart';
 import 'package:mockito/mockito.dart';
diff --git a/packages/palette_generator/CHANGELOG.md b/packages/palette_generator/CHANGELOG.md
index 8de0bd6..691e046 100644
--- a/packages/palette_generator/CHANGELOG.md
+++ b/packages/palette_generator/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Fix `unnecessary_import` lint errors.
+
 ## 0.3.1
 
 * Add PaletteGenerator.fromByteData to allow creating palette from image byte data.
diff --git a/packages/palette_generator/example/lib/main.dart b/packages/palette_generator/example/lib/main.dart
index e7321f8..33bfbf4 100644
--- a/packages/palette_generator/example/lib/main.dart
+++ b/packages/palette_generator/example/lib/main.dart
@@ -6,7 +6,6 @@
 import 'dart:math' as math;
 
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
 
 import 'package:palette_generator/palette_generator.dart';
 
diff --git a/packages/rfw/CHANGELOG.md b/packages/rfw/CHANGELOG.md
index 0d8803f..6f3c1e1 100644
--- a/packages/rfw/CHANGELOG.md
+++ b/packages/rfw/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Fix `unnecessary_import` lint errors.
+
 ## 1.0.0
 
 * Initial release.
diff --git a/packages/rfw/lib/flutter/core_widgets.dart b/packages/rfw/lib/flutter/core_widgets.dart
index 4863323..f60897e 100644
--- a/packages/rfw/lib/flutter/core_widgets.dart
+++ b/packages/rfw/lib/flutter/core_widgets.dart
@@ -12,7 +12,6 @@
 
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 
 import 'argument_decoders.dart';
 import 'runtime.dart';
diff --git a/packages/rfw/lib/flutter/material_widgets.dart b/packages/rfw/lib/flutter/material_widgets.dart
index c10d9f3..382627e 100644
--- a/packages/rfw/lib/flutter/material_widgets.dart
+++ b/packages/rfw/lib/flutter/material_widgets.dart
@@ -10,7 +10,6 @@
 
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 
 import 'argument_decoders.dart';
 import 'runtime.dart';