debugobjects: Remove pointless hlist initialization

It's BSS zero initialized.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/all/20241007164913.200379308@linutronix.de

Author: KAGA-KOKO

lib/debugobjects.c

@@ -1364,20 +1364,11 @@ static bool __init debug_objects_replace_static_objects(struct kmem_cache *cache
 void __init debug_objects_mem_init(void)
 {
 	struct kmem_cache *cache;
-	int cpu, extras;
+	int extras;
 
 	if (!debug_objects_enabled)
 		return;
 
-	/*
-	 * Initialize the percpu object pools
-	 *
-	 * Initialization is not strictly necessary, but was done for
-	 * completeness.
-	 */
-	for_each_possible_cpu(cpu)
-		INIT_HLIST_HEAD(&per_cpu(percpu_obj_pool.free_objs, cpu));
-
 	if (!debug_objects_selftest())
 		return;