remove duplicate definition of CLASS_DEF() in AnalysisBase

For historical reasons there were two definitions of the macro CLASS_DEF() in AnalysisBase. There was never a good reason for that and one of them was actually undefining the other one.

Now I consolidated on just one, and switched over all users of the removed one.

Control/AthToolSupport/AsgTools/AsgTools/CLASS_DEF.h

-/*
-  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
-*/
-
-// David Adams
-// January 2014
-//
-// Wrapper for Athena CLASS_DEF macro.
-// Ignores the macro in other environments.
-//
-// Note that the clid command can be used to generate the class ID:
-//   clid -m MyClassName
-
-// Set this flag to show calls to CLASS_DEF in stanadlone environments.
-//#define CLASSDEF_SHOWDEFS
-#ifndef XAOD_STANDALONE
-  #undef CLASSDEF_SHOWDEFS
-#endif
-
-#ifdef CLASSDEF_SHOWDEFS
-#include <iostream>
-int announce(const char* name, int clid) {
-  std::cout << "*********************** Loading clid for " << name << ": " << clid << std::endl;
-  return clid;
-}
-#endif
-
-#ifndef XAOD_STANDALONE
-  #include "AthenaKernel/CLASS_DEF.h"
-#else
-  #ifdef CLASSDEF_SHOWDEFS
-    #define CLASS_DEF(NAME, CLID, VER) int clid_CLASS = announce(#NAME, CLID);
-  #else
-    // Do not define macro if someone else has already done so.
-    #ifndef CLASS_DEF
-      #define CLASS_DEF(NAME, CLID, VER)
-    #endif
-  #endif
-#endif