Combine ModuleInit and GetModuleObject

The two functions can be combined into one as both are called only
once. This removes the need for the explicit ModuleInit function.

server/modules/monitor/mysqlmon/mysql_mon.c

@@ -107,16 +107,6 @@ static MONITOR_OBJECT MyObject =
     diagnostics
 };
 
-/**
- * The module initialisation routine, called when the module
- * is first loaded.
- */
-void
-ModuleInit()
-{
-    MXS_NOTICE("Initialise the MySQL Monitor module.");
-}
-
 /**
  * The module entry point routine. It is this routine that
  * must populate the structure that is referred to as the
@@ -128,6 +118,7 @@ ModuleInit()
 MONITOR_OBJECT *
 GetModuleObject()
 {
+    MXS_NOTICE("Initialise the MySQL Monitor module.");
     return &MyObject;
 }