5189bae50c
In Vulkan, UBOs are lowered by nir_lower_explicit_io, and the ubo_base_agx sysval is unused (since it doesn't handle descriptor sets). That makes the UBO lowering GL-only and hence belongs with the GL driver rather than the compiler. This lets us delete the ubo_base_agx sysval. Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24847>