GitLab

Removes the surprisingly few unused includes and GN deps I could find.

Fixed: 1045664
Change-Id: I2cab2467857b1d60b527911cc54074af8f8e5677
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424253
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810752}