Allow git_cl to be called when no default server is given

Review-Url: https://codereview.chromium.org/2109253002
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 6d4827c..902fd07 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -1493,14 +1493,8 @@
   def test_description_rietveld(self):
     out = StringIO.StringIO()
     self.mock(git_cl.sys, 'stdout', out)
-    self.mock(git_cl.Changelist, 'GetDescription',
-              lambda *args: 'foobar')
+    self.mock(git_cl.Changelist, 'GetDescription', lambda *args: 'foobar')
 
-    self.calls = [
-        ((['git', 'config', 'rietveld.autoupdate'],), ''),
-        ((['git', 'config', 'rietveld.server'],), ''),
-        ((['git', 'config', 'rietveld.server'],), ''),
-    ]
     self.assertEqual(0, git_cl.main([
         'description', 'https://code.review.org/123123', '-d', '--rietveld']))
     self.assertEqual('foobar\n', out.getvalue())
@@ -1508,8 +1502,7 @@
   def test_description_gerrit(self):
     out = StringIO.StringIO()
     self.mock(git_cl.sys, 'stdout', out)
-    self.mock(git_cl.Changelist, 'GetDescription',
-              lambda *args: 'foobar')
+    self.mock(git_cl.Changelist, 'GetDescription', lambda *args: 'foobar')
 
     self.assertEqual(0, git_cl.main([
         'description', 'https://code.review.org/123123', '-d', '--gerrit']))