rebaseline_server: delete no-longer-used weightedDiffMeasure

gm/rebaseline_server/imagepairset_test.py

 #!/usr/bin/python
 
 """
 Copyright 2014 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 Test imagepairset.py
 """
@@ skipping 17 matching lines @@
     },
     imagepair.KEY__IMAGEPAIRS__IMAGE_A_URL: 'test1/1111.png',
     imagepair.KEY__IMAGEPAIRS__IMAGE_B_URL: 'test1/1111.png',
     imagepair.KEY__IMAGEPAIRS__IS_DIFFERENT: False,
 }
 IMAGEPAIR_2_AS_DICT = {
     imagepair.KEY__IMAGEPAIRS__DIFFERENCES: {
         'maxDiffPerChannel': [1, 2, 3],
         'numDifferingPixels': 111,
         'percentDifferingPixels': 22.222,
-        'weightedDiffMeasure': 33.333,
     },
     imagepair.KEY__IMAGEPAIRS__EXTRACOLUMNS: {
         'builder': 'MyBuilder',
         'test': 'test2',
     },
     imagepair.KEY__IMAGEPAIRS__IMAGE_A_URL: 'test2/2222.png',
     imagepair.KEY__IMAGEPAIRS__IMAGE_B_URL: 'test2/22223.png',
     imagepair.KEY__IMAGEPAIRS__IS_DIFFERENT: True,
 }
 IMAGEPAIR_3_AS_DICT = {
     imagepair.KEY__IMAGEPAIRS__DIFFERENCES: {
         'maxDiffPerChannel': [4, 5, 6],
         'numDifferingPixels': 111,
         'percentDifferingPixels': 44.444,
-        'weightedDiffMeasure': 33.333,
     },
     imagepair.KEY__IMAGEPAIRS__EXPECTATIONS: {
         'bugs': [1001, 1002],
         'ignoreFailure': True,
     },
     imagepair.KEY__IMAGEPAIRS__EXTRACOLUMNS: {
         'builder': 'MyBuilder',
         'test': 'test3',
     },
     imagepair.KEY__IMAGEPAIRS__IMAGE_A_URL: 'test3/3333.png',
@@ skipping 109 matching lines @@
     return self._dict_to_return
 
 
 def main():
   suite = unittest.TestLoader().loadTestsFromTestCase(ImagePairSetTest)
   unittest.TextTestRunner(verbosity=2).run(suite)
 
 
 if __name__ == '__main__':
   main()