[CrOS SplitSettings] Remove about page resources and references.

Os-settings depends on about_page, which depends on the
pre-forked reset_page/ version, which will no longer exist
in os_settings_resources.pak once reset_page is forked to make

This change deletes about page resources and references for now.
They will be added back in once forking/refactoring plan is
determined. (see 1604362).

Change-Id: I0b3c3992dc5b53518c8bc64a6ce552887b92b2d3
Bug: 950007
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617647
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661865}
5 files changed