Surveys can be deleted from Handshake, as long as there are no responses. If there are responses, the survey will not be able to be deleted, only marked as closed.
1. Go to your Surveys page (https://app.joinhandshake.com/surveys)
2. Find the survey you want to delete
3. Click on the hash marks to the far right, and select "Delete."
This will remove the survey from your surveys page.