Stop downloading snapshots as native git:// is faster

Downloading and streaming a tar into Git is slower than just
letting the native git:// protocol handle the data transfer,
especially when there are multiple revisions available and
Git can perform delta compression across revisions.

Signed-off-by: Shawn O. Pearce <sop@google.com>

project.py

@@ -466,8 +466,6 @@ class Project(object):
     for r in self.extraRemotes.values():
       if not self._RemoteFetch(r.name):
         return False
-    if not self._SnapshotDownload():
-      return False
     if not self._RemoteFetch():
       return False
     self._RepairAndroidImportErrors()
@@ -629,33 +627,6 @@ class Project(object):
     self._CopyFiles()
     return True
 
-  def _SnapshotDownload(self):
-    if self.snapshots:
-      have = set(self._allrefs.keys())
-      need = []
-
-      for tag, sn in self.snapshots.iteritems():
-        if tag not in have:
-          need.append(sn)
-
-      if need:
-        print >>sys.stderr, """
-  ***   Downloading source(s) from a mirror site.     ***
-  ***   If the network hangs, kill and restart repo.  ***
-"""
-        for sn in need:
-          try:
-            sn.Import()
-          except ImportError, e:
-            print >>sys.stderr, \
-              'error: Cannot import %s: %s' \
-              % (self.name, e)
-            return False
-        cmd = ['repack', '-a', '-d', '-f', '-l']
-        if GitCommand(self, cmd, bare = True).Wait() != 0:
-          return False
-    return True
-
   def AddCopyFile(self, src, dest):
     # dest should already be an absolute path, but src is project relative
     # make src an absolute path