remove UPDATE type of closed group control message

protos/SignalService.proto

@@ -99,7 +99,6 @@ message DataMessage {
 
 	  enum Type {
 	    NEW                           = 1; // publicKey, name, encryptionKeyPair, members, admins, expireTimer
-	    UPDATE                        = 2; // name, members
       ENCRYPTION_KEY_PAIR           = 3; // publicKey, wrappers
       NAME_CHANGE                   = 4; // name
       MEMBERS_ADDED                 = 5; // members

ts/receiver/closedGroups.ts

@@ -56,12 +56,6 @@ export async function handleClosedGroupControlMessage(
     return;
   }
 
-  if (type === Type.UPDATE) {
-    window?.log?.error('ClosedGroup: Got a non explicit group update. dropping it ', type);
-    await removeFromCache(envelope);
-    return;
-  }
-
   // We drop New closed group message from our other devices, as they will come as ConfigurationMessage instead
   if (type === Type.ENCRYPTION_KEY_PAIR) {
     const isComingFromGroupPubkey =