flags: remove gesture-editing

This flag is wired to a switch which itself does nothing, so this change removes
both.

Bug: None
Change-Id: I194799e8318fd4fba6b43968488ff7d38c60d169
Reviewed-on: https://chromium-review.googlesource.com/c/1473430
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Leo Zhang <googleo@chromium.org>
Reviewed-by: Leo Zhang <googleo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632525}
6 files changed