See at the bottom there in the return bit? comment out the method you are not using, so it would be like this:

return {
        //pageInit: pageInit,
        fieldChanged: fieldChanged,
        //postSourcing: postSourcing,
       // sublistChanged: sublistChanged,
        //lineInit: lineInit,
        //validateField: validateField,
        //validateLine: validateLine,
        //validateInsert: validateInsert,
        //validateDelete: validateDelete,
        //saveRecord: saveRecord
    };