mesa: drop unused context parameter to shader program data reference.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14437>

src/mesa/program/program.c

@@ -301,7 +301,7 @@ _mesa_reference_program_(struct gl_context *ctx,
 
       if (p_atomic_dec_zero(&oldProg->RefCount)) {
          assert(ctx);
-         _mesa_reference_shader_program_data(ctx, &oldProg->sh.data, NULL);
+         _mesa_reference_shader_program_data(&oldProg->sh.data, NULL);
          st_delete_program(ctx, oldProg);
       }