Remove unnecessary enum modifiers

Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>

weaver/src/main/java/org/aspectj/weaver/tools/cache/CachedClassEntry.java

@@ -16,7 +16,7 @@ package org.aspectj.weaver.tools.cache;
  * Represents a class which has been cached
  */
 public class CachedClassEntry {
-    static enum EntryType {
+    enum EntryType {
         GENERATED,
         WEAVED,
         IGNORED,

weaver/src/main/java/org/aspectj/weaver/tools/cache/CachedClassReference.java

@@ -23,7 +23,7 @@ package org.aspectj.weaver.tools.cache;
  * objects manually.
  */
 public class CachedClassReference {
-	static enum EntryType {
+	enum EntryType {
 		GENERATED,
 		WEAVED,
 		IGNORED,