compiler/glsl: drop rogue argument to _mesa_glsl_error

This arugment is not present int the format-string, so we shouldn't pass
it to _mesa_glsl_error either.

Noticed by Coverity.

Fixes: 02dc74fbd7 ("glsl: parse invocations layout qualifier for ARB_gpu_shader5")
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9911>

src/compiler/glsl/glsl_parser.yy

@@ -1863,7 +1863,7 @@ layout_qualifier_id:
              !state->EXT_geometry_shader_enable) {
             _mesa_glsl_error(& @3, state,
                              "GL_ARB_gpu_shader5 invocations "
-                             "qualifier specified", $3);
+                             "qualifier specified");
          }
       }