nuke dead expandVariableReferences() overload prototype

Change-Id: I0c6fceac0b984e4613932b8507a632dd83d0e79b
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

qmake/library/qmakeevaluator.h

@@ -182,7 +182,6 @@ public:
     void setTemplate();
 
     ProStringList split_value_list(const QString &vals, const ProFile *source = 0);
-    ProStringList expandVariableReferences(const ProString &value, int *pos = 0, bool joined = false);
     ProStringList expandVariableReferences(const ushort *&tokPtr, int sizeHint = 0, bool joined = false);
 
     QString currentFileName() const;