Remove obsolete visitor in Listize

Author: mgreter

listize.cpp

@@ -78,13 +78,9 @@ namespace Sass {
     return l;
   }
 
-  Expression* Listize::operator()(Parent_Selector* sel)
-  {
-    return 0;
-  }
-
   Expression* Listize::fallback_impl(AST_Node* n)
   {
-    return static_cast<Expression*>(n);
+    return dynamic_cast<Expression*>(n);
   }
+
 }

listize.hpp

@@ -30,7 +30,6 @@ namespace Sass {
     Expression* operator()(Selector_List*);
     Expression* operator()(Complex_Selector*);
     Expression* operator()(Compound_Selector*);
-    Expression* operator()(Parent_Selector*);
 
     template <typename U>
     Expression* fallback(U x) { return fallback_impl(x); }