Seems to be failing dEQP-GLES2.functional.uniform_api.value.unused_uniforms.* on Linux (possibly Win as well)

BUG=angleproject:1123

This reverts commit 54f882c9.

Change-Id: I7dbbf40aae8dd9ebd35895df0dd338a3b6b9cc96
Reviewed-on: https://chromium-review.googlesource.com/297051Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>