Revert "Create ref for new patch set on direct push"

This reverts commit 928a29657a0c122ce6e3fdc32f83b3a8f5bed8e3

It turned out that this breaks uploading of new patch sets for review
since in this case the change ref is already created and trying to
create it again fails.

Change-Id: Icb3678d19bf10201a3731f3f534942fa064416e2
1 file changed