Clean up ahead of PR.

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -299,7 +299,7 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(yapDatabaseModifiedExternally:)
                                                  name:YapDatabaseModifiedExternallyNotification
-                                               object:TSStorageManager.sharedManager.dbNotificationObject];
+                                               object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(applicationWillEnterForeground:)
                                                  name:OWSApplicationWillEnterForegroundNotification

Signal/src/ViewControllers/HomeViewController.m

@@ -137,7 +137,7 @@ typedef NS_ENUM(NSInteger, CellState) { kArchiveState, kInboxState };
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(yapDatabaseModified:)
                                                  name:YapDatabaseModifiedNotification
-                                               object:nil];
+                                               object:TSStorageManager.sharedManager.dbNotificationObject];
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(yapDatabaseModifiedExternally:)
                                                  name:YapDatabaseModifiedExternallyNotification

Signal/src/ViewControllers/OWSLinkedDevicesTableViewController.m

@@ -69,7 +69,7 @@ int const OWSLinkedDevicesTableViewControllerSectionAddDevice = 1;
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(yapDatabaseModifiedExternally:)
                                                  name:YapDatabaseModifiedExternallyNotification
-                                               object:TSStorageManager.sharedManager.dbNotificationObject];
+                                               object:nil];
 
     self.refreshControl = [UIRefreshControl new];
     [self.refreshControl addTarget:self action:@selector(refreshDevices) forControlEvents:UIControlEventValueChanged];

SignalMessaging/Views/ThreadViewHelper.m

@@ -104,14 +104,14 @@ NS_ASSUME_NONNULL_BEGIN
         [[NSNotificationCenter defaultCenter] addObserver:self
                                                  selector:@selector(yapDatabaseModifiedExternally:)
                                                      name:YapDatabaseModifiedExternallyNotification
-                                                   object:TSStorageManager.sharedManager.dbNotificationObject];
+                                                   object:nil];
     } else {
         [[NSNotificationCenter defaultCenter] removeObserver:self
                                                         name:YapDatabaseModifiedNotification
                                                       object:TSStorageManager.sharedManager.dbNotificationObject];
         [[NSNotificationCenter defaultCenter] removeObserver:self
                                                         name:YapDatabaseModifiedExternallyNotification
-                                                      object:TSStorageManager.sharedManager.dbNotificationObject];
+                                                      object:nil];
     }
 }
 

SignalServiceKit/src/Messages/OWSMessageManager.m

@@ -130,7 +130,7 @@ NS_ASSUME_NONNULL_BEGIN
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(yapDatabaseModified:)
                                                  name:YapDatabaseModifiedExternallyNotification
-                                               object:TSStorageManager.sharedManager.dbNotificationObject];
+                                               object:nil];
 }
 
 - (void)yapDatabaseModified:(NSNotification *)notification