Remove unused PATCH from chrome_cleaner VERSION file

R=proberge@chromium.org

Bug: 830892
Change-Id: Ib22499d88a2fdb160a083eeb904e17e24a96edfc
Reviewed-on: https://chromium-review.googlesource.com/c/1331876Reviewed-by: proberge <proberge@chromium.org>
Commit-Queue: Joe Mason <joenotcharles@google.com>
Cr-Commit-Position: refs/heads/master@{#607364}

chrome/chrome_cleaner/constants/VERSION

 MAJOR=0
 MINOR=0
 BUILD=0
-PATCH=0