Simple append and remove excercise not working

Simple append and remove excercise not working

I am trying to create a small code of making a list , when user put in the value in the input box and click on add, it should add the item to the list , I have figured that part out , but my problem is i can't remove them.

you can see the code here 


Please let me know what am I doing wrong....

Thanks 
Dire