Remove all harmony runtime flags which shipped in M51

test/mjsunit/mirror-regexp.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug --harmony-unicode-regexps
+// Flags: --expose-debug-as debug
 // Test the mirror object for regular expression values
 
 var dont_enum = debug.PropertyAttribute.DontEnum;
 var dont_delete = debug.PropertyAttribute.DontDelete;
 var expected_prototype_attributes = {
   'source': dont_enum,
   'global': dont_enum,
   'ignoreCase': dont_enum,
   'multiline': dont_enum,
   'unicode' : dont_enum,
@@ skipping 53 matching lines @@
                refs.lookup(fromJSON.properties[0].ref).value);
 }
 
 
 // Test Date values.
 testRegExpMirror(/x/);
 testRegExpMirror(/[abc]/);
 testRegExpMirror(/[\r\n]/g);
 testRegExpMirror(/a*b/gmi);
 testRegExpMirror(/(\u{0066}|\u{0062})oo/u);