net: Remove unnecessary returns from void function()s

This patch removes from net/ (but not any netfilter files)
all the unnecessary return; statements that precede the
last closing brace of void functions.

It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.

Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
  xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sysctl_net.c

@@ -82,7 +82,6 @@ static int __net_init sysctl_net_init(struct net *net)
 static void __net_exit sysctl_net_exit(struct net *net)
 {
 	WARN_ON(!list_empty(&net->sysctls.list));
-	return;
 }
 
 static struct pernet_operations sysctl_pernet_ops = {