cgroup: remove now unused list_head @pending in cgroup_apply_cftypes()

Signed-off-by: Tejun Heo <tj@kernel.org>

kernel/cgroup/cgroup.c

@@ -3230,7 +3230,6 @@ restart:
 
 static int cgroup_apply_cftypes(struct cftype *cfts, bool is_add)
 {
-	LIST_HEAD(pending);
 	struct cgroup_subsys *ss = cfts[0].ss;
 	struct cgroup *root = &ss->root->cgrp;
 	struct cgroup_subsys_state *css;