You can delete a survey from your account.
Note: Some features may be restricted based on permissions for your user role.
Open Author Menu
In the Global Navigation menu, click the Author icon. Then, click the Surveys menu option.
Note: The Global Navigation menu may differ depending on what is enabled in your account.
On the Surveys page, locate the survey you want to delete. You can use the Search field  or the Sort & Filter drop-down menu .
Click the Remove icon.
To confirm, click the Delete link.