[iOS] Remove side effects from DevTools (swizzling, module exporting)

- Remove swizzling from dev tools
- Remove RCT_EXPORT_MODULE from RCTDevMenu

Do not use RCT_EXPORT_MODULE in RCTDevMenu

Because this class swizzles a system method inside `initialize`, all the versions of RCTDevMenu conflict with each other when we use RCT_EXPORT_MODULE because they are all referenced immediately at runtime.

packages/react-native/React/CoreModules/RCTDevMenu.mm

@@ -103,15 +103,7 @@ @implementation RCTDevMenu {
 @synthesize callableJSModules = _callableJSModules;
 @synthesize bundleManager = _bundleManager;
 
-RCT_EXPORT_MODULE()
-
-+ (void)initialize
-{
-  // We're swizzling here because it's poor form to override methods in a category,
-  // however UIWindow doesn't actually implement motionEnded:withEvent:, so there's
-  // no need to call the original implementation.
-  RCTSwapInstanceMethods([UIWindow class], @selector(motionEnded:withEvent:), @selector(RCT_motionEnded:withEvent:));
-}
++ (NSString *)moduleName { return @"RCTDevMenu"; }
 
 + (BOOL)requiresMainQueueSetup
 {