intel/compiler: remove unused fs_validator::param_size

Found by Coverity as unitialized variable.

Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6667>
diff --git a/src/intel/compiler/brw_fs.h b/src/intel/compiler/brw_fs.h
index 0843f6e..bf57f8e 100644
--- a/src/intel/compiler/brw_fs.h
+++ b/src/intel/compiler/brw_fs.h
@@ -343,8 +343,6 @@
 
    const struct brw_vue_map *input_vue_map;
 
-   int *param_size;
-
    BRW_ANALYSIS(live_analysis, brw::fs_live_variables,
                 backend_shader *) live_analysis;
    BRW_ANALYSIS(regpressure_analysis, brw::register_pressure,