Introduce private worker header

include/maxscale/worker.h

@@ -37,14 +37,6 @@ enum mxs_worker_msg_id
     MXS_WORKER_MSG_PING
 };
 
-/**
- * Initialize the worker mechanism.
- *
- * To be called once at process startup. This will cause as many workers
- * to be created as the number of threads defined.
- */
-void mxs_worker_init();
-
 /**
  * Return the worker associated with the provided worker id.
  *