net_sched: minor netns related cleanup

These changes were suggested by Alexey Dobriyan <adobriyan@gmail.com>:

  - psched_show() does not use any private data so just pass NULL to
    psched_open()

  - remove unnecessary return statement
Signed-off-by: NTom Goff <thomas.goff@boeing.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/sch_api.c

@@ -1683,7 +1683,7 @@ static int psched_show(struct seq_file *seq, void *v)
 
 static int psched_open(struct inode *inode, struct file *file)
 {
-	return single_open(file, psched_show, PDE(inode)->data);
+	return single_open(file, psched_show, NULL);
 }
 
 static const struct file_operations psched_fops = {
@@ -1708,8 +1708,6 @@ static int __net_init psched_net_init(struct net *net)
 static void __net_exit psched_net_exit(struct net *net)
 {
 	proc_net_remove(net, "psched");
-
-	return;
 }
 #else
 static int __net_init psched_net_init(struct net *net)