Remove myself from printing/OWNERS.

Bug: None
Change-Id: Id6d3f0166185246f63e4c6ed1364a3fe8eb37572
Reviewed-on: https://chromium-review.googlesource.com/c/1262036Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596769}

printing/OWNERS

-dpapad@chromium.org
 rbpotter@chromium.org
 thestig@chromium.org
 weili@chromium.org