This is to remove a failure on the intel trybots were ANGLE is currently
enable to create any context while this test expects creation to
succeed.

BUG=angleproject:891

Change-Id: I0450da3211fd958a17f6db0d7e2a85968d6e3a87
Reviewed-on: https://chromium-review.googlesource.com/304730
Tryjob-Request: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>