Remove misleading line about git's lack of revision numbers.

Change-Id: I8a22cb4b4bef9bceee1f43381435d664c2cfd770

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351357 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed