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/include/openbsc/vty.h b/openbsc/include/openbsc/vty.h
index ad2cd2a..f79eab5 100644
--- a/openbsc/include/openbsc/vty.h
+++ b/openbsc/include/openbsc/vty.h
@@ -44,7 +44,7 @@
 extern void bsc_replace_string(void *ctx, char **dst, const char *newstr);
 
 struct log_info;
-int bsc_vty_init(const struct log_info *cat, struct gsm_network *network);
+int bsc_vty_init(struct gsm_network *network);
 int bsc_vty_init_extra(void);
 
 struct gsm_network *gsmnet_from_vty(struct vty *vty);