Remove references to Rietveld from skia's presubmit

R=rmistry@chromium.org

Change-Id: I75c171b9fc9843b5289c759e85b32e51a126fe9b
Reviewed-on: https://skia-review.googlesource.com/57302
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
1 file changed