An option pool can only be deleted from Cake if it is empty. In other words, if there are offers within the pool - whether they be drafts or granted offers, they need to be removed first before you can go ahead and delete the overall pool.
Deleting ESOP offers (stock option grants)
From the main menu, select 'Equity Plans';
From the dropdown, select 'Options';
Click on 'View pool' on the relevant option plan; and
On any offer you wish to delete, click on the trash icon on the right hand side of their offer under the 'Offer List'
Deleting an Option Pool
From the main menu, select 'Equity Plans';
From the dropdown, select 'Options';
Click on 'View pool' on the relevant option plan; and
Click the trash icon in the top right corner.