eglQueryWaylandBufferWL: drop EGL_TEXTURE_Y_UV_WL

using EGL_TEXTURE_Y_UV_WL will also require EGL_WAYLAND_PLANE_WL,
but we don't support EGL_WAYLAND_PLANE_WL.

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
Merge pull request #138 from groleo/master

eglQueryWaylandBufferWL: drop EGL_TEXTURE_Y_UV_WL