Don't expose CHROMIUM_color_buffer_float_rgb[a] in ES3.0+ These extensions are superseded by EXT_color_buffer_float and not needed to support WebGL2. Allowing them to expose rendering to RGB[A]32F when EXT_color_buffer_float is not supported causes dEQP failures. BUG=angleproject:3939 Change-Id: Ib50a061526f29fc0628e732123c04a22800345dc Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1832525 Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Alexis Hétu <sugoi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>