Update the Google+ API Service class. This change simply removes the unused contentSource attributes/classes.
Update the Google+ API Service class. This change simply removes the unused contentSource attributes/classes.


iJanki/google-api-php-client,marcj/google-api-php-client,Exercise/google-api-php-client,Exercise/google-api-php-client,marcj/google-api-php-client,iJanki/google-api-php-client