CrOS Shelf: Remove app sync UI that changes the home button's tooltip

Bug: 971426
Change-Id: I4ecaea02e61908297ee366c99f7dba0db8ee3595
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1661079
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#669724}
3 files changed