btrfs: props: remove unnecessary hash_init()

DEFINE_HASHTABLE itself has already included initialization code,
we don't have to call hash_init() again, so remove it.
Signed-off-by: NChengguang Xu <cgxu519@mykernel.net>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/props.c

@@ -437,8 +437,6 @@ void __init btrfs_props_init(void)
 {
 	int i;
 
-	hash_init(prop_handlers_ht);
-
 	for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
 		struct prop_handler *p = &prop_handlers[i];
 		u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));