Corentin Wallez a83e0cdbcc Remove stray push constant code.
There was still some logic associated with push constants in Dawn. This
removes it to remove some code and reclaim one buffer in Metal. Related
code was found via `git grep "push constant"`.

BUG=

Change-Id: I17de9d47872483875b6fa292f8259ef1fc4ecaf3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/11904
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2019-10-08 07:37:02 +00:00
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