Revert dependency overrides for non-video_player packages

Author: ArvidNy

packages/interactive_media_ads/example/pubspec.yaml

@@ -24,11 +24,3 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
-# FOR TESTING AND INITIAL REVIEW ONLY. DO NOT MERGE.
-# See https://github.com/flutter/flutter/blob/master/docs/ecosystem/contributing/README.md#changing-federated-plugins
-dependency_overrides:
-  video_player: {path: ../../../packages/video_player/video_player}
-  video_player_android: {path: ../../../packages/video_player/video_player_android}
-  video_player_avfoundation: {path: ../../../packages/video_player/video_player_avfoundation}
-  video_player_platform_interface: {path: ../../../packages/video_player/video_player_platform_interface}
-  video_player_web: {path: ../../../packages/video_player/video_player_web}