ExpressionEvaluation: Remove use of BOOST_FOREACH.

Use range-based for instead.

PhysicsAnalysis/CommonTools/ExpressionEvaluation/Root/ParsingInternals.cxx

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 */
 
 /////////////////////////////////////////////////////////////////
@@ -186,7 +186,7 @@ namespace ExpressionParsing {
   void Compiler::operator()(ast::expression const& x) const
   {
     boost::apply_visitor(*this, x.first);
-    BOOST_FOREACH(ast::operation const& oper, x.rest)
+    for(ast::operation const& oper : x.rest)
     {
       (*this)(oper);
     }

PhysicsAnalysis/CommonTools/ExpressionEvaluation/Root/ParsingInternals.h

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 */
 
 /////////////////////////////////////////////////////////////////
@@ -25,7 +25,6 @@
 #include <boost/variant/apply_visitor.hpp>
 #include <boost/fusion/include/adapt_struct.hpp>
 #include <boost/spirit/include/phoenix_function.hpp>
-#include <boost/foreach.hpp>
 
 #include <iostream>
 #include <string>