update extensions for Firebase Data Connect event

PiperOrigin-RevId: 811872308

Author: yoshi-code-bot

proto/google/events/firebase/dataconnect/v1/events.proto

@@ -145,7 +145,6 @@ message MutationExecutedEvent {
   option (google.events.cloud_event_extension_name) = "operation";
   option (google.events.cloud_event_extension_name) = "authtype";
   option (google.events.cloud_event_extension_name) = "authid";
-  option (google.events.cloud_event_extension_name) = "authclaims";
 
   // The data associated with the event.
   MutationEventData data = 1;