If an intention has only one answer, you can’t delete it because it can’t be blank. You can delete it only if there is another associated answer.
To do this, simply click on the trash can icon or find the option in the three dots dropdown menu.
Important: This action can’t be undone.
If the answer is part of a flow and contains nodes you will not be able to delete it without deleting the nodes first, here you will find an article to help: How can I delete a node?