This removes the frame state input representing the before-state from
nodes having any shift operator. Any lowering that woult insert number
conversions of the inputs has already been disabled when deoptimization
is enabled, because the frame state layout is no longer known.

R=epertoso@chromium.org
BUG=v8:5021

Review-Url: https://codereview.chromium.org/2190743003
Cr-Commit-Position: refs/heads/master@{#38194}