Revert "Create TSOutgoingMessage with info on group change"

Inadvertently stole credit for work done when squashing the commits.
Reverting and re-merging giving appropriate credit.

This reverts commit 8242c9e381.

Podfile.lock

@@ -134,7 +134,7 @@ EXTERNAL SOURCES:
 
 CHECKOUT OPTIONS:
   SignalServiceKit:
-    :commit: d4c55d69404c99927da716c443997415ad7bc6ba
+    :commit: 91fcd01632a81f2aa67d2d94b97c68d519e6881a
     :git: https://github.com/WhisperSystems/SignalServiceKit.git
   SocketRocket:
     :commit: 41b57bb2fc292a814f758441a05243eb38457027

Signal/src/view controllers/MessagesViewController.m

@@ -2028,10 +2028,6 @@ typedef enum : NSUInteger {
 
     [self.editingDatabaseConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
       groupThread            = [TSGroupThread getOrCreateThreadWithGroupModel:newGroupModel transaction:transaction];
-
-        NSString *updateGroupInfo =
-            [groupThread.groupModel getInfoStringAboutUpdateTo:newGroupModel contactsManager:self.contactsManager];
-
       groupThread.groupModel = newGroupModel;
       [groupThread saveWithTransaction:transaction];
       message = [[TSOutgoingMessage alloc] initWithTimestamp:[NSDate ows_millisecondTimeStamp]
@@ -2039,7 +2035,6 @@ typedef enum : NSUInteger {
                                                  messageBody:@""
                                                attachmentIds:[NSMutableArray new]];
       message.groupMetaMessage = TSGroupMessageUpdate;
-        message.customMessage = updateGroupInfo;
     }];
 
     if (newGroupModel.groupImage != nil) {

Signal/src/view controllers/NewGroupViewController.m

@@ -138,7 +138,6 @@ static NSString *const kUnwindToMessagesViewSegue = @"UnwindToMessagesViewSegue"
                                                             messageBody:@""
                                                           attachmentIds:[NSMutableArray new]];
                        message.groupMetaMessage = TSGroupMessageNew;
-                       message.customMessage = NSLocalizedString(@"GROUP_CREATED", nil);
                        if (model.groupImage != nil) {
                            [[TSMessagesManager sharedManager] sendAttachment:UIImagePNGRepresentation(model.groupImage)
                                contentType:OWSMimeTypeImagePng