Remove unnecessary semicolons in enum declarations

Change-Id: I8006f8f541455947e9ca29e06829a3d0b3176715

gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/Header.java

@@ -67,7 +67,7 @@ public class Header extends Composite {
   }
 
   private static enum ReviewedState {
-    AUTO_REVIEW, LOADED;
+    AUTO_REVIEW, LOADED
   }
 
   @UiField CheckBox reviewed;