remove parent pointers

stepmania/src/XmlFile.cpp

@@ -210,7 +210,6 @@ char* XNode::LoadAttributes( const char* pszAttrs , PARSEINFO *pi /*= &piDefault
 		}
 		
 		XAttr *attr = new XAttr;
-		attr->parent = this;
 
 		// XML Attr Name
 		SetString( xml, pEnd, &attr->name );
@@ -370,7 +369,6 @@ char* XNode::Load( const char* pszXml, PARSEINFO *pi /*= &piDefault*/ )
 		while( xml && *xml )
 		{
 			XNode *node = new XNode;
-			node->parent = this;
 			
 			xml = node->Load( xml,pi );
 			if( !node->name.empty() )
@@ -861,7 +859,6 @@ XNode *XNode::AppendChild( const char* name, const DateTime &value )	{ XNode *p
 //========================================================
 XNode *XNode::AppendChild( XNode *node )
 {
-	node->parent = this;
 	childs.push_back( node );
 	return node;
 }
@@ -934,7 +931,6 @@ XAttrs::iterator XNode::GetAttrIterator( XAttr *attr )
 //========================================================
 XAttr *XNode::AppendAttr( XAttr *attr )
 {
-	attr->parent = this;
 	attrs.push_back( attr );
 	return attr;
 }

stepmania/src/XmlFile.h

@@ -115,8 +115,6 @@ struct XAttr
 	void GetValue(unsigned &out) const;
 	void GetValue(DateTime &out) const;
 	
-	XNode*	parent;
-
 	bool GetXML( RageFileBasic &f, DISP_OPT *opt = &optDefault );
 };
 
@@ -139,7 +137,6 @@ struct XNode
 	void SetValue(const DateTime &v);
 
 	// internal variables
-	XNode	*parent;		// parent node
 	XNodes	childs;		// child node
 	XAttrs	attrs;		// attributes
 
@@ -207,7 +204,7 @@ struct XNode
 	bool	RemoveAttr( XAttr *attr );
 	XAttr *DetachAttr( XAttr *attr );
 
-	XNode() { parent = NULL; }
+	XNode() { }
 	~XNode();
 
 	void Close();