How to delete row in sap ui5 table???

i am try below code but i getting error

controller.js

{

     if (idx !== -1) {

       var m = tbl.getModel();

       var data = m.getData();

       var removed = data.splice(idx, 1);

       m.setData(data);

       alert(JSON.stringify(removed[0]) +  'is removed');

     } else {

       alert('Please select a row');