Navigate to your dashboard and click on the user icon in the upper right corner. Then click Account Settings.
Then select 'My price list.'
Find the the item you want to delete and click the edit icon to it's far right.
A window will appear where you can edit the information or delete the item all together. Click the 'delete item' button in the bottom left to delete.
A confirmation screen will appear. Click 'delete item' to confirm the action.