MXS-2218 Implement housekeeper in terms of MainWorker

include/maxscale/housekeeper.h

@@ -32,30 +32,6 @@ MXS_BEGIN_DECLS
  */
 typedef bool (* TASKFN)(void* data);
 
-/**
- * Initialises the housekeeper mechanism.
- *
- * A call to any of the other housekeeper functions can be made only if
- * this function returns successfully. This function must be called after all
- * module level initialization is done but before any monitors or services are
- * started.
- *
- * @return True if the housekeeper mechanism was initialized, false otherwise.
- */
-bool hkinit();
-
-/**
- * Start the housekeeper thread
- *
- * @return True if the housekeeper mechanism was started
- */
-bool hkstart();
-
-/**
- * Waits for the housekeeper thread to finish.
- */
-void hkfinish();
-
 /**
  * @brief Add a new task
  *