pipeline: remove unused _MASK defines
pipeline: remove unused _MASK defines

The COGL_PIPELINE_FRAGEND_XYZ_MASK and COGL_PIPELINE_VERTEND_XYZ_MASK
defines aren't used any more so this patch simply removes them.

Reviewed-by: Neil Roberts <822ec91a7ef82248fd36162ca8ac3283eba70848@linux.intel.com>

djdeath/cogl,djdeath/cogl,djdeath/cogl-android,gcampax/cogl,djdeath/cogl-android,djdeath/cogl,gcampax/cogl,gcampax/cogl,djdeath/cogl-android,gcampax/cogl