Remove debug statements

https://github.com/Hamlib/Hamlib/issues/1087

src/debug.c

@@ -209,7 +209,6 @@ void HAMLIB_API rig_debug(enum rig_debug_level_e debug_level,
     }
 
     pthread_mutex_lock(&client_debug_lock);
-    printf("lock1\n");
     va_start(ap, fmt);
 
     if (rig_vprintf_cb)
@@ -271,7 +270,6 @@ void HAMLIB_API rig_debug(enum rig_debug_level_e debug_level,
     va_end(ap);
 #endif
     pthread_mutex_unlock(&client_debug_lock);
-    printf("lock2\n");
 }