Remove "pluginClass: none" from pubspecs (#4475)

This workaround has not been needed since Flutter 1.20, and all plugins
now require at least Flutter 2.0, so it can be safely removed.

Part of https://github.com/flutter/flutter/issues/57497
diff --git a/packages/path_provider/path_provider_linux/CHANGELOG.md b/packages/path_provider/path_provider_linux/CHANGELOG.md
index 6f18d0d..a3febb0 100644
--- a/packages/path_provider/path_provider_linux/CHANGELOG.md
+++ b/packages/path_provider/path_provider_linux/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.1.1
+
+* Removed obsolete `pluginClass: none` from pubpsec.
+
 ## 2.1.0
 
 * Now `getTemporaryPath` returns the value of the `TMPDIR` environment variable primarily. If `TMPDIR` is not set, `/tmp` is returned.
diff --git a/packages/path_provider/path_provider_linux/pubspec.yaml b/packages/path_provider/path_provider_linux/pubspec.yaml
index f5b7a88..bc17887 100644
--- a/packages/path_provider/path_provider_linux/pubspec.yaml
+++ b/packages/path_provider/path_provider_linux/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Linux implementation of the path_provider plugin
 repository: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_linux
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+path_provider%22
-version: 2.1.0
+version: 2.1.1
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
@@ -14,7 +14,6 @@
     platforms:
       linux:
         dartPluginClass: PathProviderLinux
-        pluginClass: none
 
 dependencies:
   flutter:
diff --git a/packages/path_provider/path_provider_windows/CHANGELOG.md b/packages/path_provider/path_provider_windows/CHANGELOG.md
index 953bb89..d7eaeee 100644
--- a/packages/path_provider/path_provider_windows/CHANGELOG.md
+++ b/packages/path_provider/path_provider_windows/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.4
+
+* Removed obsolete `pluginClass: none` from pubpsec.
+
 ## 2.0.3
 
 * Updated installation instructions in README.
diff --git a/packages/path_provider/path_provider_windows/pubspec.yaml b/packages/path_provider/path_provider_windows/pubspec.yaml
index 0353574..78d403a 100644
--- a/packages/path_provider/path_provider_windows/pubspec.yaml
+++ b/packages/path_provider/path_provider_windows/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Windows implementation of the path_provider plugin
 repository: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_windows
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+path_provider%22
-version: 2.0.3
+version: 2.0.4
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
@@ -14,7 +14,6 @@
     platforms:
       windows:
         dartPluginClass: PathProviderWindows
-        pluginClass: none
 
 dependencies:
   ffi: ^1.0.0
diff --git a/packages/shared_preferences/shared_preferences_linux/CHANGELOG.md b/packages/shared_preferences/shared_preferences_linux/CHANGELOG.md
index 6fd14ee..e0178ed 100644
--- a/packages/shared_preferences/shared_preferences_linux/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_linux/CHANGELOG.md
@@ -1,5 +1,6 @@
-## NEXT
+## 2.0.3
 
+* Removed obsolete `pluginClass: none` from pubpsec.
 * Fixes newly enabled analyzer options.
 
 ## 2.0.2
diff --git a/packages/shared_preferences/shared_preferences_linux/pubspec.yaml b/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
index b6d1765..9eb4bcd 100644
--- a/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Linux implementation of the shared_preferences plugin
 repository: https://github.com/flutter/plugins/tree/master/packages/shared_preferences/shared_preferences_linux
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.0.2
+version: 2.0.3
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
@@ -14,7 +14,6 @@
     platforms:
       linux:
         dartPluginClass: SharedPreferencesLinux
-        pluginClass: none
 
 dependencies:
   file: ^6.0.0
diff --git a/packages/shared_preferences/shared_preferences_windows/CHANGELOG.md b/packages/shared_preferences/shared_preferences_windows/CHANGELOG.md
index 68358a3..544322f 100644
--- a/packages/shared_preferences/shared_preferences_windows/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_windows/CHANGELOG.md
@@ -1,5 +1,6 @@
-## NEXT
+## 2.0.3
 
+* Removed obsolete `pluginClass: none` from pubpsec.
 * Fixes newly enabled analyzer options.
 
 ## 2.0.2
diff --git a/packages/shared_preferences/shared_preferences_windows/pubspec.yaml b/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
index 76b3c74..cae748d 100644
--- a/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Windows implementation of shared_preferences
 repository: https://github.com/flutter/plugins/tree/master/packages/shared_preferences/shared_preferences_windows
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.0.2
+version: 2.0.3
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
@@ -14,7 +14,6 @@
     platforms:
       windows:
         dartPluginClass: SharedPreferencesWindows
-        pluginClass: none
 
 dependencies:
   file: ^6.0.0