8312521: Unused field LocaleProviderAdapter#defaultLocaleProviderAdapter could be removed

Reviewed-by: naoto

Author: Andrey Turbanov

src/java.base/share/classes/sun/util/locale/provider/LocaleProviderAdapter.java

@@ -108,12 +108,6 @@ public String getTextResourcesPackage() {
      */
     private static final Map<Type, LocaleProviderAdapter> adapterInstances = new ConcurrentHashMap<>();
 
-    /**
-     * Default fallback adapter type, which should return something meaningful in any case.
-     * This is either CLDR or FALLBACK.
-     */
-    static volatile LocaleProviderAdapter.Type defaultLocaleProviderAdapter;
-
     /**
      * Adapter lookup cache.
      */
@@ -147,13 +141,11 @@ public String getTextResourcesPackage() {
             }
         }
 
-        defaultLocaleProviderAdapter = Type.CLDR;
         if (!typeList.isEmpty()) {
             // bona fide preference exists
             if (!(typeList.contains(Type.CLDR) || typeList.contains(Type.JRE))) {
                 // Append FALLBACK as the last resort when no ResourceBundleBasedAdapter is available.
                 typeList.add(Type.FALLBACK);
-                defaultLocaleProviderAdapter = Type.FALLBACK;
             }
         } else {
             // Default preference list.
@@ -345,10 +337,10 @@ public static Locale[] toLocaleArray(Set<String> tags) {
     public abstract BreakIteratorProvider getBreakIteratorProvider();
 
     /**
-     * Returns a ollatorProvider for this LocaleProviderAdapter, or null if no
-     * ollatorProvider is available.
+     * Returns a CollatorProvider for this LocaleProviderAdapter, or null if no
+     * CollatorProvider is available.
      *
-     * @return a ollatorProvider
+     * @return a collatorProvider
      */
     public abstract CollatorProvider getCollatorProvider();