GitLab

Remove the Chrome Webstore thumbnail. NTP thumbnails have been
deprecated as of M69.

Bug: 893362
Change-Id: If5b7c3b40fb2033785385af0e64003c91f131701
Reviewed-on: https://chromium-review.googlesource.com/c/1357604
Commit-Queue: Kristi Park <kristipark@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Ramya Nagarajan <ramyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613791}