localectl: remove unnecessary line break

If /etc/locale.conf is empty or does not exist, the output of
'localectl status' command includes an unnecessary line break
as follows:
=======================
   System Locale: n/a

       VC Keymap: n/a
      X11 Layout: n/a
=======================
This commit removes the line break after the system locale.

src/locale/localectl.c

@@ -131,7 +131,7 @@ static void print_status_info(StatusInfo *i) {
         assert(i);
 
         if (strv_isempty(i->locale))
-                puts("   System Locale: n/a\n");
+                puts("   System Locale: n/a");
         else {
                 char **j;