purge mempool code

We aren't using this anywhere, so drop it entirely.

BUG=chromium:878440
TEST=build works

Change-Id: I77896661e3836e945bfae90afdf52c157b457351
Reviewed-on: https://chromium-review.googlesource.com/1194719
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
2 files changed