Clean up MultiviewDrawTest.cpp The patch cleans up MultiviewDrawTest.cpp by removing some calls to glUseProgram as that would be done by drawQuad anyway. BUG=angleproject:2062 TEST=angle_end2end_tests Change-Id: If9aff686b0ea25e63467852845c46582fdf741c5 Reviewed-on: https://chromium-review.googlesource.com/657678 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>