st: remove unused tgsi includes

Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22838>

src/mesa/state_tracker/st_cb_texture.c

@@ -84,7 +84,6 @@
 #include "util/u_memory.h"
 #include "util/u_simple_shaders.h"
 #include "cso_cache/cso_context.h"
-#include "tgsi/tgsi_ureg.h"
 
 #define DBG if (0) printf
 

src/mesa/state_tracker/st_nir_builtins.c

@@ -20,14 +20,12 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#include "tgsi/tgsi_from_mesa.h"
 #include "st_nir.h"
 #include "st_program.h"
 
 #include "compiler/nir/nir_builder.h"
 #include "compiler/glsl/gl_nir.h"
 #include "compiler/glsl/gl_nir_linker.h"
-#include "tgsi/tgsi_parse.h"
 
 void
 st_nir_finish_builtin_nir(struct st_context *st, nir_shader *nir)