Yes. However, only collections created for free AND that have not yet been minted from (still offchain) can be deleted.
How do I delete my collection?
To delete your collection, head to the "Manage Collection" page by selecting the following:
Select the token that you would like to delete.
**Remember, only collections that have no minted items can be deleted.
Then, you can go to the "Settings" tab.
Select "Delete token".
This will prompt you to sign a signature request. Once you sign this, your token will be deleted from your collection.