[LayoutNG] Remove stale flag-specific expected.txt

popup-allowed-from-gesture-initiated-event was changed to
testharness.js. LayoutNG had flag-specific expected.txt due
to different space collapsing in text dump. This patch
removes the stale expected.txt.

TBR=eae@chromium.org, mstensho@chromium.org
NOTRY=true

Bug: 591099
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: Id6b262611153d3cc0ad44a6454c3d7ede44d7d48
Reviewed-on: https://chromium-review.googlesource.com/1249472
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594996}
2 files changed