Delete unused search_header.css

R=dbeam@chromium.org

Bug: None
Change-Id: Ic268bc18522d3f15cc5e385677a3baac30702d74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1581499
Reviewed-by: Dan Beam <dbeam@chromium.org>
Commit-Queue: Igor Kobylin <ikobylin@yandex-team.ru>
Cr-Commit-Position: refs/heads/master@{#653683}
1 file changed