D3D11: Remove 'non-renderable' texture formats. The only difference between the NONRENDERABLE and normal versions of the formats is the rtvFormat is blank for non-renderable. The only place that I can see we check rtvFormat to make a decision is in TextureStorage11::GetTextureBindFlags. The rtvFormat here isn't necessary because we also check the 'renderTarget' flag, which won't be true for compressed formats at any time. BUG=angleproject:1455 Change-Id: Icbb438d336e67b80c44a0ab8de995a32b92e451e Reviewed-on: https://chromium-review.googlesource.com/359085 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>