The release tools used to reload CL descriptions from rietveld to consider
late edits. This makes no sense anymore with gerrit, so we drop the feature.

NOTRY=true
TBR=hablich@chromium.org

Bug: chromium:685318
Change-Id: I08231795ba3b25c0939aa2b4428973086548484d
Reviewed-on: https://chromium-review.googlesource.com/558915Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46389}