[LayoutNG] remove obsolete rebaseline

Bug: 635619
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I12d68f1153e78d4ebd8d3e92b7ab83a9f6e2f036
Reviewed-on: https://chromium-review.googlesource.com/1101905
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567666}
2 files changed