8068489: remove unnecessary complexity in Flow and Bits, after JDK-8064857

Reviewed-by: mcimadamore

src/share/classes/com/sun/tools/javac/util/Bits.java

 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -84,20 +84,6 @@ public class Bits {
 
     }
 
-    public enum BitsOpKind {
-        INIT,
-        CLEAR,
-        INCL_BIT,
-        EXCL_BIT,
-        ASSIGN,
-        AND_SET,
-        OR_SET,
-        DIFF_SET,
-        XOR_SET,
-        INCL_RANGE,
-        EXCL_RANGE,
-    }
-
     private final static int wordlen = 32;
     private final static int wordshift = 5;
     private final static int wordmask = wordlen - 1;