egl/dri2: non-shared glapi cleanups

For a while now we require shared glapi for EGL, thus we can drop a
few bits from the olden days. Namely - dlopen(NULL...) is not possible,
error out at build stage if so and drop the guard around dlclose().

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
1 file changed