cgroup: remove unneeded checks

"descendants" and "depth" are declared as int, so they can't be larger
than INT_MAX.  Static checkers complain and it's slightly confusing for
humans as well so let's just remove these conditions.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

kernel/cgroup/cgroup.c

@@ -3223,7 +3223,7 @@ static ssize_t cgroup_max_descendants_write(struct kernfs_open_file *of,
 			return ret;
 	}
 
-	if (descendants < 0 || descendants > INT_MAX)
+	if (descendants < 0)
 		return -ERANGE;
 
 	cgrp = cgroup_kn_lock_live(of->kn, false);
@@ -3266,7 +3266,7 @@ static ssize_t cgroup_max_depth_write(struct kernfs_open_file *of,
 			return ret;
 	}
 
-	if (depth < 0 || depth > INT_MAX)
+	if (depth < 0)
 		return -ERANGE;
 
 	cgrp = cgroup_kn_lock_live(of->kn, false);