cros: Remove dead touchable app context menu code

For ash/app_list.

Bug: 906684
Change-Id: I8b3b79ba1e4220d0c2a3e3df8e822300ac6f63a7
Reviewed-on: https://chromium-review.googlesource.com/c/1342621
Reviewed-by: Weidong Guo <weidongg@chromium.org>
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609401}
2 files changed