Remove _logWarnIfCreateRootViewWithBridgeIsOverridden (facebook#44271)

Summary:
Fixes customizeRootView migration comment. cc cipolleschi

## Changelog:

[IOS] [FIXED] - Fixes customizeRootView migration comment

Pull Request resolved: facebook#44271

Test Plan: ![image](https://github.com/facebook/react-native/assets/5061845/bf8b7628-9c23-4920-80bb-72b3ab08fbe3)

Reviewed By: christophpurrer

Differential Revision: D56821755

Pulled By: cipolleschi

fbshipit-source-id: 5f85929d35ffc8768e5a7f1e76d738613bc70b14

Author: zhongwuzw

packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm

@@ -54,7 +54,6 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
   if (self.newArchEnabled || self.fabricEnabled) {
     [RCTComponentViewFactory currentComponentViewFactory].thirdPartyFabricComponentsProvider = self;
   }
-  [self _logWarnIfCreateRootViewWithBridgeIsOverridden];
   [self customizeRootView:(RCTRootView *)rootView];
 
   self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
@@ -96,21 +95,6 @@ - (UIView *)createRootViewWithBridge:(RCTBridge *)bridge
   return rootView;
 }
 
-// TODO T173939093 - Remove _logWarnIfCreateRootViewWithBridgeIsOverridden after 0.74 is cut
-- (void)_logWarnIfCreateRootViewWithBridgeIsOverridden
-{
-  SEL selector = @selector(createRootViewWithBridge:moduleName:initProps:);
-  IMP baseClassImp = method_getImplementation(class_getInstanceMethod([RCTAppDelegate class], selector));
-  IMP currentClassImp = method_getImplementation(class_getInstanceMethod([self class], selector));
-  if (currentClassImp != baseClassImp) {
-    NSString *warnMessage =
-        @"If you are using the `createRootViewWithBridge` to customize the root view appearence,"
-         "for example to set the backgroundColor, please migrate to `customizeRootView` method.\n"
-         "The `createRootViewWithBridge` method is not invoked in bridgeless.";
-    RCTLogWarn(@"%@", warnMessage);
-  }
-}
-
 - (UIViewController *)createRootViewController
 {
   return [UIViewController new];