Remove extension check in validation of ES3.2 entry points Bug: angleproject:3582 Change-Id: I563c6d77b825afd44809db0d08dc4842a5f93b6a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2653914 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>