Clean up CODEOWNERS (flutter#3438)

Author: Emmanuel Garcia

CODEOWNERS

@@ -4,23 +4,12 @@
 # These names are just suggestions. It is fine to have your changes
 # reviewed by someone else.
 
-packages/android_alarm_manager/**              @bkonyi
-packages/android_intent/**                     @mklim @matthew-carroll
-packages/battery/**                            @matthew-carroll
+
 packages/camera/**                             @bparrishMines
-packages/connectivity/**                       @matthew-carroll
 packages/cross_file/**                         @ditman @mvanbeusekom
-packages/device_info/**                        @matthew-carroll
-packages/espresso/**                           @collinjackson @adazh
 packages/file_selector/**                      @ditman
 packages/google_maps_flutter/**                @cyanglaz
-packages/google_sign_in/**                     @mehmetf
 packages/image_picker/**                       @cyanglaz
 packages/integration_test/**                   @dnfield
-packages/in_app_purchase/**                    @mklim @cyanglaz @LHLL
+packages/in_app_purchase/**                    @cyanglaz @LHLL
 packages/ios_platform_images/**                @gaaclarke
-packages/package_info/**                       @matthew-carroll
-packages/path_provider/**                      @matthew-carroll
-packages/shared_preferences/**                 @matthew-carroll
-packages/url_launcher/**                       @mklim
-packages/video_player/**                       @iskakaushik