- Remove unused IsSpecialization
- Simplify IsCompatibleForLoad

Change-Id: I555adf9869322b600072c5006ff71f6b846d4241
Reviewed-on: https://chromium-review.googlesource.com/c/1479958Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59760}