Revert "Revert "Revert "Debug scaffolding."""

This reverts commit 1cd6941f68cac054355277bea6972fe571651402.

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -1190,19 +1190,6 @@ typedef enum : NSUInteger {
 
     // Clear the "on open" state after the view has been presented.
     self.actionOnOpen = ConversationViewActionNone;
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        NSURL *_Nullable url = [[NSBundle mainBundle] URLForResource:@"qr@2x" withExtension:@"png"];
-        OWSAssertDebug(url);
-
-        DataSource *_Nullable dataSource = [DataSourcePath dataSourceWithURL:url shouldDeleteOnDeallocation:NO];
-        OWSAssertDebug(dataSource);
-        SignalAttachment *attachment = [SignalAttachment attachmentWithDataSource:dataSource
-                                                                          dataUTI:(NSString *)kUTTypePNG
-                                                                     imageQuality:TSImageQualityOriginal];
-
-        [self showApprovalDialogForAttachments:@[ attachment ]];
-    });
 }
 
 // `viewWillDisappear` is called whenever the view *starts* to disappear,

Signal/src/ViewControllers/HomeView/HomeViewController.m

@@ -481,12 +481,6 @@ NSString *const kArchivedConversationsReuseIdentifier = @"kArchivedConversations
     [self.searchResultsController viewDidAppear:animated];
 
     self.hasEverAppeared = YES;
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:HomeViewControllerSectionConversations];
-        TSThread *thread = [self threadForIndexPath:indexPath];
-        [self presentThread:thread action:ConversationViewActionNone animated:YES];
-    });
 }
 
 - (void)viewDidDisappear:(BOOL)animated