Remove hack for support of old Hebrew language code. (#13309)

See https://github.com/flutter/flutter/issues/11907 and https://github.com/flutter/engine/pull/4411

packages/flutter/lib/src/widgets/app.dart

@@ -319,21 +319,6 @@ class _WidgetsAppState extends State<WidgetsApp> implements WidgetsBindingObserv
   Locale _locale;
 
   Locale _resolveLocale(Locale newLocale, Iterable<Locale> supportedLocales) {
-    // Android devices (Java really) report 3 deprecated language codes, see
-    // http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4140555
-    // and https://developer.android.com/reference/java/util/Locale.html
-    switch (newLocale.languageCode) {
-      case 'iw':
-        newLocale = new Locale('he', newLocale.countryCode); // Hebrew
-        break;
-      case 'ji':
-        newLocale = new Locale('yi', newLocale.countryCode); // Yiddish
-        break;
-      case 'in':
-        newLocale = new Locale('id', newLocale.countryCode); // Indonesian
-        break;
-    }
-
     if (widget.localeResolutionCallback != null) {
       final Locale locale = widget.localeResolutionCallback(newLocale, widget.supportedLocales);
       if (locale != null)