xfrm6: Remove commented out function call to xfrm6_input_fini

xfrm6_input_fini() is not in the tree since more than 10 years,
so remove the commented out function call.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

net/ipv6/xfrm6_policy.c

@@ -356,7 +356,6 @@ void xfrm6_fini(void)
 	if (sysctl_hdr)
 		unregister_net_sysctl_table(sysctl_hdr);
 #endif
-	//xfrm6_input_fini();
 	xfrm6_policy_fini();
 	xfrm6_state_fini();
 	dst_entries_destroy(&xfrm6_dst_ops);