diff --git a/METADATA b/METADATA
deleted file mode 100644
index c19596387..000000000
--- a/METADATA
+++ /dev/null
@@ -1,121 +0,0 @@
-# Format: google3/devtools/metadata/metadata.proto (go/google3metadata)
-
-name: "Google Play Games plugin for Unity"
-description: "A plugin used by Unity developers to access Play Games Services APIs."
-
-third_party {
-  url {
-    type: GIT
-    value: "https://github.com/playgameservices/play-games-plugin-for-unity"
-  }
-  version: "dc10a3cd4fabf2c18d8089500f4d9021375aa383"
-  last_upgrade_date {
-    year: 2020
-    month: 1
-    day: 7
-  }
-}
-
-presubmit: {
-  path_expression: "//depot/google3/third_party/unity/play_games_services/project/..."
-  path_expression_exclusion: "//depot/.../METADATA"
-  path_expression_exclusion: "//depot/.../OWNERS"
-
-  # If the change propagates to github, a section of the change description
-  # needs to be marked as public.
-  check_description: {
-    base {
-      id: "CheckBeginEndPublic"
-    }
-    action: REVIEW
-    action: SUBMIT
-
-    failure_message:
-      "\n"
-      "CL descriptions for changes to //third_party/unity/play_games_services/project\n"
-      "must contain one or more sections delimited as follows:\n"
-      "\n"
-      "BEGIN_PUBLIC\n"
-      "...text exposed to open source public git repo...\n"
-      "END_PUBLIC\n"
-      "\n"
-
-    required_regexp:
-      "(^|\\n)\\s*BEGIN_PUBLIC\\s*?\\n"
-      "(.*\\n)*"
-      "\\s*\\S+.*(\\n.*)*\\n"
-      "\\s*END_PUBLIC\\s*?\\n"
-
-    required_for_cleanup: true
-  }
-}
-
-# Copybara presubmit
-presubmit: {
-  path_expression: "//depot/google3/third_party/unity/play_games_services/project/..."
-  path_expression_exclusion: "//depot/.../METADATA"
-  path_expression_exclusion: "//depot/.../OWNERS"
-  # Add more path exclusions here...
-  check_presubmit_service: {
-    base: {
-      id: "Copybara-Review"
-      disable_tags: "GIT_ORIGIN_REV_ID"
-      disable_tags: "SKIP_COPYBARA"
-    }
-    action: REVIEW
-    streaming: true
-    timeout: 30
-    failure_status: WARNING
-    execution_mode: SECONDARY_EXECUTION
-    include_all_opened_files: true
-    include_deleted_files: true
-    address: "blade:copybara-streaming-presubmit-service-prod"
-    options: "depot_path=//depot/google3/third_party/unity/play_games_services/copybara/copy.bara.sky;workflow=presubmit_piper_to_gerrit;feedback=feedback_gerrit_to_critique;blocking=false"
-  }
-  check_presubmit_service: {
-    base: {
-      id: "Copybara-Submit"
-      disable_tags: "GIT_ORIGIN_REV_ID"
-      disable_tags: "SKIP_COPYBARA"
-    }
-    action: SUBMIT
-    streaming: true
-    timeout: 600
-    failure_status: ERROR
-    execution_mode: SECONDARY_EXECUTION
-    include_all_opened_files: true
-    include_deleted_files: true
-    address: "blade:copybara-streaming-presubmit-service-prod"
-    options: "depot_path=//depot/google3/third_party/unity/play_games_services/copybara/copy.bara.sky;workflow=presubmit_piper_to_gerrit;feedback=feedback_gerrit_to_critique;blocking=true"
-  }
-}
-
-presubmit: {
-  path_expression: ".../gradle-wrapper.jar"
-  path_expression: ".../gradlew"
-  path_expression: ".../gradlew.bat"
-
-  check_file_operation: {
-    operation: ADD
-    failure_message:
-      "Gradle wrapper files should not be added to this project.\n"
-      "\tThese files are managed by //google3/third_party/gradle/ and added\n"
-      "\tto the build with Copybara.\n"
-      "\n"
-      "\tFiles:"
-    failure_status: ERROR
-  }
-}
-
-# Validate JSON.
-presubmit: {
-  path_expression: "....asmdef"
-  path_expression: "....json"
-  check_presubmit_service: {
-    base: {
-      id: "CheckJson"
-    }
-    failure_status: ERROR
-    address: "blade:youtube-metadata-presubmit-youtube-check_json-prod"
-  }
-}
diff --git a/OWNERS b/OWNERS
deleted file mode 100644
index 2cd01b9e0..000000000
--- a/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-file://depot/google3/third_party/unity/play_games_services/OWNERS
diff --git a/source/SupportLib/PlayGamesPluginSupport/build.gradle b/source/SupportLib/PlayGamesPluginSupport/build.gradle
index 9eba45694..e4a5dcd6c 100644
--- a/source/SupportLib/PlayGamesPluginSupport/build.gradle
+++ b/source/SupportLib/PlayGamesPluginSupport/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         mavenLocal()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.3'
+        classpath 'com.android.tools.build:gradle:4.0.0'
     }
 }