Revert of Implement owners check in presubmit for Gerrit. (patchset #5 id:80001 of https://codereview.chromium.org/1927773002/ )

Reason for revert:
now it doesn't work for gerrit. Damn it.

Original issue's description:
> Implement owners check in presubmit for Gerrit.
> 
> R=machenbach@chromium.org,phajdan.jr@chromium.org
> BUG=605563
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=300350

TBR=machenbach@chromium.org,phajdan.jr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=605563

Review-Url: https://codereview.chromium.org/1935563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@300352 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index bf94913..9bf60ea 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -1317,8 +1317,7 @@
       return presubmit_support.DoPresubmitChecks(change, committing,
           verbose=verbose, output_stream=sys.stdout, input_stream=sys.stdin,
           default_presubmit=None, may_prompt=may_prompt,
-          rietveld_obj=self._codereview_impl.GetRieveldObjForPresubmit(),
-          gerrit_obj=self._codereview_impl.GetGerritObjForPresubmit())
+          rietveld_obj=self._codereview_impl.GetRieveldObjForPresubmit())
     except presubmit_support.PresubmitFailure, e:
       DieWithError(
           ('%s\nMaybe your depot_tools is out of date?\n'
@@ -1502,10 +1501,6 @@
     # For non-Rietveld codereviews, this probably should return a dummy object.
     raise NotImplementedError()
 
-  def GetGerritObjForPresubmit(self):
-    # None is valid return value, otherwise presubmit_support.GerritAccessor.
-    return None
-
   def UpdateDescriptionRemote(self, description):
     """Update the description on codereview site."""
     raise NotImplementedError()
@@ -2112,9 +2107,6 @@
         raise NotImplementedError()
     return ThisIsNotRietveldIssue()
 
-  def GetGerritObjForPresubmit(self):
-    return presubmit_support.GerritAccessor(self._GetGerritHost())
-
   def GetStatus(self):
     """Apply a rough heuristic to give a simple summary of an issue's review
     or CQ status, assuming adherence to a common workflow.