cleaned up mxomnicreateparambase

I remember there being a reason why I included MxOmniCreateParambase in ISLE, but testing now it doesn't seem to be what I thought (or maybe other factors are influencing it now). Indeed it seems this is unnecessary now.

LEGO1/mxomnicreateparambase.cpp

@@ -1,6 +1 @@
 #include "mxomnicreateparam.h"
-
-MxOmniCreateParamBase::~MxOmniCreateParamBase()
-{
-
-}