nitb: Only print channel activations once in show statistics

openbsc_vty_print_statistics will already print these counters
for us. No need to print them again.
diff --git a/openbsc/src/libmsc/vty_interface_layer3.c b/openbsc/src/libmsc/vty_interface_layer3.c
index 5b727ef..afa263c 100644
--- a/openbsc/src/libmsc/vty_interface_layer3.c
+++ b/openbsc/src/libmsc/vty_interface_layer3.c
@@ -799,9 +799,6 @@
 	struct gsm_network *net = gsmnet_from_vty(vty);
 
 	openbsc_vty_print_statistics(vty, net);
-	vty_out(vty, "Channel Requests        : %lu total, %lu no channel%s",
-		osmo_counter_get(net->stats.chreq.total),
-		osmo_counter_get(net->stats.chreq.no_channel), VTY_NEWLINE);
 	vty_out(vty, "Location Update         : %lu attach, %lu normal, %lu periodic%s",
 		osmo_counter_get(net->stats.loc_upd_type.attach),
 		osmo_counter_get(net->stats.loc_upd_type.normal),