Remove button in the Todo Exercise

[Manuel Alejandro Alvarado Montenegro]

I would like to know if the only action for remove is to change the text decoration of the task to line-through or if there actually should be a remove button.
If it so, i can't visualize it, why that could be?
I added myself a remove button but it only works if you type the exact name of the task and press the remove button, but the text decoration for the removed element keep stored.
Thank you.