[RootLayerScrolls] Remove deadcode in LocalFrameView

This was generated using:
https://chromium-coverage.appspot.com/reports/572002/linux/chromium/src/third_party/blink/renderer/core/frame/local_frame_view.cc.html

BUG=823365

Change-Id: I136ba88950e2d042fd330cedb88614562af2e264
Reviewed-on: https://chromium-review.googlesource.com/1125309
Reviewed-by: Stefan Zager <szager@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572419}
2 files changed