We don't need an explicit diamond in JSBuiltinReducer to produce a
Boolean. The NumberEqual operator already produces a Boolean, so we
just need to negate the result.

Change-Id: I442b0d98a4ab83002757906d6cc104682b87a853
Reviewed-on: https://chromium-review.googlesource.com/707434Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48406}