Make gclient cleanup do a 'correcter' thing for git

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 8380b345163e5b29ac7a7d12e91a168048c1399d..b7426f48b2fd3e8bbdddc772f31f4fbf53bc46ca 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -114,11 +114,11 @@ class GitWrapper(SCMWrapper, scm.GIT):
   """Wrapper for Git"""
 
   def cleanup(self, options, args, file_list):
-    """Cleanup working copy."""
+    """'Cleanup' the repo.
+
+    There's no real git equivalent for the svn cleanup command, do a no-op.
+    """
     __pychecker__ = 'unusednames=options,args,file_list'
-    self._Run(['prune'], redirect_stdout=False)
-    self._Run(['fsck'], redirect_stdout=False)
-    self._Run(['gc'], redirect_stdout=False)
 
   def diff(self, options, args, file_list):
     __pychecker__ = 'unusednames=options,args,file_list'