Right now, the static_asserts will fail on certain platforms with
certain configurations as the class sizes differ between platforms.

Bug: angleproject:4779
Change-Id: I92f61393b2e9e5b7d6dc9085b1a42cb377143469
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2280987Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>