Delete/Update record of model is not working in ember-data?

Delete/Update record of model is not working in ember-data?

I have made simple CRUD program here.
But on click of delete (here i am trying to delete first record of model)
it is not deleting any record,it is throwing error
Uncaught TypeError: Object function () {..} has no method 'deleteRecord'
Can anyone help me to solve this issue i am struggling on this issue from
last 2 days? I have posted my code here.