Switch release scripts to pure git.

tools/push-to-trunk/auto_push.py

 #!/usr/bin/env python
 # Copyright 2013 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
@@ skipping 94 matching lines @@
   def RunStep(self):
     print "Pushing lkgr %s to candidates." % self["lkgr"]
 
     args = [
       "--author", self._options.author,
       "--reviewer", self._options.reviewer,
       "--revision", self["lkgr"],
       "--force",
     ]
 
-    if self._options.svn:
-      args.extend(["--svn", self._options.svn])
-    if self._options.svn_config:
-      args.extend(["--svn-config", self._options.svn_config])
-    if self._options.vc_interface:
-      args.extend(["--vc-interface", self._options.vc_interface])
     if self._options.work_dir:
       args.extend(["--work-dir", self._options.work_dir])
 
     # TODO(machenbach): Update the script before calling it.
     if self._options.push:
       self._side_effect_handler.Call(push_to_trunk.PushToTrunk().Run, args)
 
 
 class AutoPush(ScriptsBase):
   def _PrepareOptions(self, parser):
@@ skipping 20 matching lines @@
       CheckAutoPushSettings,
       CheckTreeStatus,
       FetchLKGR,
       CheckLastPush,
       PushToCandidates,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(AutoPush().Run())