Removes JavaScriptFrame::CollectTopFrameForICStats whose last usage was
removed in https://chromium-review.googlesource.com/626016.

Bug: v8:8834
Change-Id: I9ffad0c712816696c56b746a137bed30362550bc
Reviewed-on: https://chromium-review.googlesource.com/c/1496365
Auto-Submit: Dan Elphick <delphick@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60002}