vty: remove ignored logging parameters

Since ce9fec3e896571835ac5bfd2980d6836f2b29f0d libosmocore ignores
parameters to log_vty_command_* functions. Hence parameter of
logging_vty_add_cmds() is ignored too. As we depend on much later
libosmocore version anyway, we can simplify code somewhat by removing
parameters which will be ignored anyway.

Change-Id: I62f752fd88f1d8fefa563648f9864c7c31f87991
diff --git a/openbsc/src/osmo-nitb/bsc_hack.c b/openbsc/src/osmo-nitb/bsc_hack.c
index bbcdd1b..2bdfada 100644
--- a/openbsc/src/osmo-nitb/bsc_hack.c
+++ b/openbsc/src/osmo-nitb/bsc_hack.c
@@ -283,7 +283,7 @@
 	}
 
 	/* Initialize VTY */
-	bsc_vty_init(&log_info, bsc_gsmnet);
+	bsc_vty_init(bsc_gsmnet);
 	ctrl_vty_init(tall_bsc_ctx);
 
 #ifdef BUILD_SMPP