Remove undefined param passed to logging_vty_add_cmds

Since March 15th 2017, libosmocore API logging_vty_add_cmds() had its
parameter removed (c65c5b4ea075ef6cef11fff9442ae0b15c1d6af7). However,
definition in C file doesn't contain "(void)", which means number of
parameters is undefined and thus compiler doesn't complain. Let's remove
parameters from all callers before enforcing "(void)" on it.

Related: OS#4138
Change-Id: I6d0dbbd83ce17ee798bfb6e30378ed1dbae19134
diff --git a/src/hlr_vty.c b/src/hlr_vty.c
index e6567cc..f7c5bc8 100644
--- a/src/hlr_vty.c
+++ b/src/hlr_vty.c
@@ -429,9 +429,9 @@
 	}
 }
 
-void hlr_vty_init(const struct log_info *cat)
+void hlr_vty_init(void)
 {
-	logging_vty_add_cmds(cat);
+	logging_vty_add_cmds();
 	osmo_talloc_vty_add_cmds();
 	osmo_stats_vty_add_cmds();