[various] Remove unused Gradle files (#6623)

diff --git a/packages/espresso/android/gradle/wrapper/gradle-wrapper.properties b/packages/espresso/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index 4751774..0000000
--- a/packages/espresso/android/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,6 +0,0 @@
-#Tue Nov 26 13:04:21 PST 2019
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
diff --git a/packages/flutter_plugin_android_lifecycle/android/gradle/wrapper/gradle-wrapper.properties b/packages/flutter_plugin_android_lifecycle/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index d757f3d..0000000
--- a/packages/flutter_plugin_android_lifecycle/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-5.4.1-all.zip
diff --git a/packages/in_app_purchase/in_app_purchase_android/android/gradle/wrapper/gradle-wrapper.properties b/packages/in_app_purchase/in_app_purchase_android/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index baf2285..0000000
--- a/packages/in_app_purchase/in_app_purchase_android/android/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,6 +0,0 @@
-#Mon Oct 29 10:30:44 PDT 2018
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
diff --git a/packages/shared_preferences/shared_preferences_android/android/gradle/wrapper/gradle-wrapper.properties b/packages/shared_preferences/shared_preferences_android/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index 3c9d085..0000000
--- a/packages/shared_preferences/shared_preferences_android/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-6.7-all.zip
diff --git a/packages/video_player/video_player_android/android/gradle/wrapper/gradle-wrapper.properties b/packages/video_player/video_player_android/android/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index 9f96ce6..0000000
--- a/packages/video_player/video_player_android/android/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,6 +0,0 @@
-#Wed Oct 17 09:04:56 PDT 2018
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip