Remove an item from the list

I am creating a list where I am adding items from the list through a json data.
The problem i am facing is that I have a delete button, and on click of the button,
the selected item from the list has to be deleted from the store.

This is what i have tried

{
 text: '',
                               id: 'deletenotesBtn',
                               iconCls:'trash',
                               iconMask: true,
                               ui:'action',
                               handler: function(){
                                   var itemSelected = Ext.getCmp('noteslist').getSelection().remove();
                                 //  this.remove(this, true);
                                   alert('item deleted');
                               }
 

Any suggestions on how i can achieve it?

---