[shared_preferences] remove android no-op implementation (#2779)

* remove android folder

* version change
diff --git a/packages/shared_preferences/shared_preferences_macos/CHANGELOG.md b/packages/shared_preferences/shared_preferences_macos/CHANGELOG.md
index fb19089..1f2f684 100644
--- a/packages/shared_preferences/shared_preferences_macos/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_macos/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.0.1+9
+
+* Remove Android folder from `shared_preferences_macos`.
+
 ## 0.0.1+8
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/shared_preferences/shared_preferences_macos/android/.gitignore b/packages/shared_preferences/shared_preferences_macos/android/.gitignore
deleted file mode 100644
index c6cbe56..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/.gitignore
+++ /dev/null
@@ -1,8 +0,0 @@
-*.iml
-.gradle
-/local.properties
-/.idea/workspace.xml
-/.idea/libraries
-.DS_Store
-/build
-/captures
diff --git a/packages/shared_preferences/shared_preferences_macos/android/build.gradle b/packages/shared_preferences/shared_preferences_macos/android/build.gradle
deleted file mode 100644
index 7895628..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/build.gradle
+++ /dev/null
@@ -1,33 +0,0 @@
-group 'io.flutter.plugins.shared_preferences_macos'
-version '1.0'
-
-buildscript {
-    repositories {
-        google()
-        jcenter()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
-    }
-}
-
-rootProject.allprojects {
-    repositories {
-        google()
-        jcenter()
-    }
-}
-
-apply plugin: 'com.android.library'
-
-android {
-    compileSdkVersion 28
-
-    defaultConfig {
-        minSdkVersion 16
-    }
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-}
diff --git a/packages/shared_preferences/shared_preferences_macos/android/gradle.properties b/packages/shared_preferences/shared_preferences_macos/android/gradle.properties
deleted file mode 100644
index 7be3d8b..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/gradle.properties
+++ /dev/null
@@ -1,2 +0,0 @@
-org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
diff --git a/packages/shared_preferences/shared_preferences_macos/android/gradle/wrapper/gradle-wrapper.properties b/packages/shared_preferences/shared_preferences_macos/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index caf54fa..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
diff --git a/packages/shared_preferences/shared_preferences_macos/android/settings.gradle b/packages/shared_preferences/shared_preferences_macos/android/settings.gradle
deleted file mode 100644
index 0a474af..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/settings.gradle
+++ /dev/null
@@ -1 +0,0 @@
-rootProject.name = 'shared_preferences_macos'
diff --git a/packages/shared_preferences/shared_preferences_macos/android/src/main/AndroidManifest.xml b/packages/shared_preferences/shared_preferences_macos/android/src/main/AndroidManifest.xml
deleted file mode 100644
index 46f5304..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/src/main/AndroidManifest.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="io.flutter.plugins.shared_preferences_macos">
-</manifest>
diff --git a/packages/shared_preferences/shared_preferences_macos/android/src/main/java/io/flutter/plugins/shared_preferences_macos/SharedPreferencesMacosPlugin.java b/packages/shared_preferences/shared_preferences_macos/android/src/main/java/io/flutter/plugins/shared_preferences_macos/SharedPreferencesMacosPlugin.java
deleted file mode 100644
index 04d5598..0000000
--- a/packages/shared_preferences/shared_preferences_macos/android/src/main/java/io/flutter/plugins/shared_preferences_macos/SharedPreferencesMacosPlugin.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package io.flutter.plugins.shared_preferences_macos;
-
-import io.flutter.embedding.engine.plugins.FlutterPlugin;
-import io.flutter.plugin.common.PluginRegistry.Registrar;
-
-/** SharedPreferencesMacosPlugin */
-public class SharedPreferencesMacosPlugin implements FlutterPlugin {
-  @Override
-  public void onAttachedToEngine(FlutterPluginBinding flutterPluginBinding) {}
-
-  public static void registerWith(Registrar registrar) {}
-
-  @Override
-  public void onDetachedFromEngine(FlutterPluginBinding binding) {}
-}
diff --git a/packages/shared_preferences/shared_preferences_macos/pubspec.yaml b/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
index 95a1383..8b12f10 100644
--- a/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
@@ -3,7 +3,7 @@
 # 0.0.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.0.1+8
+version: 0.0.1+9
 homepage: https://github.com/flutter/plugins/tree/master/packages/shared_preferences/shared_preferences_macos
 
 flutter:
diff --git a/packages/shared_preferences/shared_preferences_web/CHANGELOG.md b/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
index 71e14ff..b2076dd 100644
--- a/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.2+7
+
+* Removed Android folder from `shared_preferences_web`.
+
 ## 0.1.2+6
 
 * Update lower bound of dart dependency to 2.1.0.
diff --git a/packages/shared_preferences/shared_preferences_web/android/.gitignore b/packages/shared_preferences/shared_preferences_web/android/.gitignore
deleted file mode 100644
index c6cbe56..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/.gitignore
+++ /dev/null
@@ -1,8 +0,0 @@
-*.iml
-.gradle
-/local.properties
-/.idea/workspace.xml
-/.idea/libraries
-.DS_Store
-/build
-/captures
diff --git a/packages/shared_preferences/shared_preferences_web/android/build.gradle b/packages/shared_preferences/shared_preferences_web/android/build.gradle
deleted file mode 100644
index c4ebf6b..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/build.gradle
+++ /dev/null
@@ -1,33 +0,0 @@
-group 'io.flutter.plugins.shared_preferences_web'
-version '1.0'
-
-buildscript {
-    repositories {
-        google()
-        jcenter()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
-    }
-}
-
-rootProject.allprojects {
-    repositories {
-        google()
-        jcenter()
-    }
-}
-
-apply plugin: 'com.android.library'
-
-android {
-    compileSdkVersion 28
-
-    defaultConfig {
-        minSdkVersion 16
-    }
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-}
diff --git a/packages/shared_preferences/shared_preferences_web/android/gradle.properties b/packages/shared_preferences/shared_preferences_web/android/gradle.properties
deleted file mode 100644
index 7be3d8b..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/gradle.properties
+++ /dev/null
@@ -1,2 +0,0 @@
-org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
diff --git a/packages/shared_preferences/shared_preferences_web/android/gradle/wrapper/gradle-wrapper.properties b/packages/shared_preferences/shared_preferences_web/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index caf54fa..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
diff --git a/packages/shared_preferences/shared_preferences_web/android/settings.gradle b/packages/shared_preferences/shared_preferences_web/android/settings.gradle
deleted file mode 100644
index 3d2f9c6..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/settings.gradle
+++ /dev/null
@@ -1 +0,0 @@
-rootProject.name = 'shared_preferences_web'
diff --git a/packages/shared_preferences/shared_preferences_web/android/src/main/AndroidManifest.xml b/packages/shared_preferences/shared_preferences_web/android/src/main/AndroidManifest.xml
deleted file mode 100644
index 3f97ee0..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/src/main/AndroidManifest.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="io.flutter.plugins.shared_preferences_web">
-</manifest>
diff --git a/packages/shared_preferences/shared_preferences_web/android/src/main/java/io/flutter/plugins/shared_preferences_web/SharedPreferencesWebPlugin.java b/packages/shared_preferences/shared_preferences_web/android/src/main/java/io/flutter/plugins/shared_preferences_web/SharedPreferencesWebPlugin.java
deleted file mode 100644
index 74a7575..0000000
--- a/packages/shared_preferences/shared_preferences_web/android/src/main/java/io/flutter/plugins/shared_preferences_web/SharedPreferencesWebPlugin.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package io.flutter.plugins.shared_preferences_web;
-
-import io.flutter.embedding.engine.plugins.FlutterPlugin;
-import io.flutter.plugin.common.PluginRegistry.Registrar;
-
-/** SharedPreferencesWebPlugin */
-public class SharedPreferencesWebPlugin implements FlutterPlugin {
-  @Override
-  public void onAttachedToEngine(FlutterPluginBinding flutterPluginBinding) {}
-
-  public static void registerWith(Registrar registrar) {}
-
-  @Override
-  public void onDetachedFromEngine(FlutterPluginBinding binding) {}
-}
diff --git a/packages/shared_preferences/shared_preferences_web/pubspec.yaml b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
index f50eb24..a153135 100644
--- a/packages/shared_preferences/shared_preferences_web/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
@@ -4,7 +4,7 @@
 # 0.1.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.1.2+6
+version: 0.1.2+7
 
 flutter:
   plugin: