Revert 244381 "Support GU retry command in sync engine. The comm..."

trunk/src/sync/protocol/sync.proto

Index: trunk/src/sync/protocol/sync.proto
===================================================================
--- trunk/src/sync/protocol/sync.proto	(revision 244437)
+++ trunk/src/sync/protocol/sync.proto	(working copy)
@@ -584,14 +584,10 @@
   // already created.  Should be set to true only by mobile clients.
   optional bool create_mobile_bookmarks_folder = 1000 [default = false];
 
-  // This value is an updated version of the GetUpdatesCallerInfo's
+  // This value is an udpated version of the GetUpdatesCallerInfo's
   // GetUpdatesSource.  It describes the reason for the GetUpdate request.
   // Introduced in M29.
   optional SyncEnums.GetUpdatesOrigin get_updates_origin = 9;
-
-  // Whether this GU also serves as a retry GU. Any GU that happens after
-  // retry timer timeout is a retry GU effectively.
-  optional bool is_retry = 10 [default = false];
 };
 
 message AuthenticateMessage {