libagx: remove redundant source files

depfiles handles now.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Dylan Baker <dylan.c.baker@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32505>

src/asahi/libagx/meson.build

@@ -2,19 +2,14 @@
 # SPDX-License-Identifier: MIT
 
 libagx_shader_files = files(
-  'libagx.h',
   'compression.cl',
   'draws.cl',
   'geometry.cl',
-  'geometry.h',
   'query.cl',
-  'query.h',
   'tessellation.cl',
   'tessellator.cl',
-  'tessellator.h',
   'texture.cl',
   'helper.cl',
-  'libagx_dgc.h',
 )
 
 prepended_input_args = []