"remote_run" builds explicitly supply a cleanup directory in recipe
properties, so it isn't necessary to supply it here.

BUG=chromium:725631
TEST=None
TBR=iannucci@chromium.org

Change-Id: I6eaaeea14bd699181d7ceeff6b3baac2d1cd9861
Reviewed-on: https://chromium-review.googlesource.com/528630Reviewed-by: Daniel Jacques <dnj@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>