Fix onOptionSelect callback

Author: rvsia

packages/pf4-component-mapper/src/files/dual-list-select.js

@@ -97,7 +97,6 @@ const DualList = (props) => {
             addAll: onListChange,
             addSelected: onListChange,
             filterOption,
-            onOptionSelect: onListChange,
             removeAll: onListChange,
             removeSelected: onListChange
           })}