drm/xe: Remove xe_dummy_exit()

Since commit 014125c ("drm/xe: Support 'nomodeset' kernel
command-line option") the dummy exit is not needed anymore since the
caller check for a NULL pointer. Drop it.

Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131223908.4147195-1-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

Author: lucasdemarchi

drivers/gpu/drm/xe/xe_module.c

@@ -77,10 +77,6 @@ struct init_funcs {
 	void (*exit)(void);
 };
 
-static void xe_dummy_exit(void)
-{
-}
-
 static const struct init_funcs init_funcs[] = {
 	{
 		.init = xe_check_nomodeset,
@@ -103,7 +99,6 @@ static const struct init_funcs init_funcs[] = {
 	},
 	{
 		.init = xe_pm_module_init,
-		.exit = xe_dummy_exit,
 	},
 };