git-cl: remove unnecessary similarity notice

This information is redundant when using Gerrit,
and is well known to anyone still using Rietveld.

Change-Id: I03119a84edb67fd20fbe5e2a8e0f0975e69558ed
Reviewed-on: https://chromium-review.googlesource.com/510923Reviewed-by: Andrew Bonventre <andybons@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>

git_cl.py

@@ -324,9 +324,6 @@ def add_git_similarity(parser):
     else:
       _git_set_branch_config_value('git-find-copies', bool(options.find_copies))
 
-    print('Using %d%% similarity for rename/copy detection. '
-          'Override with --similarity.' % options.similarity)
-
     return options, args
   parser.parse_args = Parse
 

tests/git_cl_test.py

@@ -982,10 +982,7 @@ class TestGitCl(TestCase):
     self.mock(sys, 'stdout', stdout)
     with self.assertRaises(SystemExitMock):
       git_cl.main(['upload', '--send-mail'])
-    self.assertEqual(
-        'Using 50% similarity for rename/copy detection. Override with '
-        '--similarity.\n',
-        stdout.getvalue())
+    self.assertEqual('', stdout.getvalue())
 
   def test_bug_on_cmd(self):
     self._run_reviewer_test(