docs: remove outdated Objective-C splash screen setup code (#4911)

Remove the Objective-C code snippet for handling splash screen transitions
from the "Publishing to Apple App Store" documentation.

Since React Native 0.71+, new projects generate `AppDelegate.swift` by default,
making the Objective-C code referencing `AppDelegate.m` and
`[self.window makeKeyAndVisible]` incompatible with modern projects.

The `LaunchScreen.storyboard` typically handles the splash screen automatically
for most use cases, and developers experiencing the white flash issue should
consider using community libraries like `react-native-bootsplash` which have
proper Swift support.

Fixes #4770

Author: joshkeldam

docs/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.77/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.78/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.79/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.80/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.81/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell

website/versioned_docs/version-0.82/publishing-to-app-store.md

@@ -19,15 +19,6 @@ To configure your app to be built using the `Release` scheme, go to **Product**
 
 #### Pro Tips
 
-As your App Bundle grows in size, you may start to see a blank screen flash between your splash screen and the display of your root application view. If this is the case, you can add the following code to `AppDelegate.m` in order to keep your splash screen displayed during the transition.
-
-```objectivec
-  // Place this code after "[self.window makeKeyAndVisible]" and before "return YES;"
-  UIStoryboard *sb = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:nil];
-  UIViewController *vc = [sb instantiateInitialViewController];
-  rootView.loadingView = vc.view;
-```
-
 The static bundle is built every time you target a physical device, even in Debug. If you want to save time, turn off bundle generation in Debug by adding the following to your shell script in the Xcode Build Phase `Bundle React Native code and images`:
 
 ```shell