Remove locale prepend on iOS

Author: GaryQian

shell/platform/darwin/ios/framework/Source/FlutterEngine.mm

@@ -762,22 +762,6 @@ - (void)onLocaleUpdated:(NSNotification*)notification {
   NSArray<NSString*>* preferredLocales = [NSLocale preferredLanguages];
   NSMutableArray<NSString*>* data = [[NSMutableArray new] autorelease];
 
-  // Force prepend the [NSLocale currentLocale] to the front of the list
-  // to ensure we are including the full default locale. preferredLocales
-  // is not guaranteed to include anything beyond the languageCode.
-  NSLocale* currentLocale = [NSLocale currentLocale];
-  NSString* languageCode = [currentLocale objectForKey:NSLocaleLanguageCode];
-  NSString* countryCode = [currentLocale objectForKey:NSLocaleCountryCode];
-  NSString* scriptCode = [currentLocale objectForKey:NSLocaleScriptCode];
-  NSString* variantCode = [currentLocale objectForKey:NSLocaleVariantCode];
-  if (languageCode) {
-    [data addObject:languageCode];
-    [data addObject:(countryCode ? countryCode : @"")];
-    [data addObject:(scriptCode ? scriptCode : @"")];
-    [data addObject:(variantCode ? variantCode : @"")];
-  }
-
-  // Add any secondary locales/languages to the list.
   for (NSString* localeID in preferredLocales) {
     NSLocale* currentLocale = [[[NSLocale alloc] initWithLocaleIdentifier:localeID] autorelease];
     NSString* languageCode = [currentLocale objectForKey:NSLocaleLanguageCode];