To delete a Membership, go to MemberDash > Memberships and hover over the Membership you wish to delete. You will then see a red Delete option.
An on-screen modal will pop up reminding you that deleting a Membership also deletes all associated subscriptions. If you have users subscribed to a Membership, you may wish to edit the Membership, instead.
If you are sure you want to delete the Membership, click Delete to finalize it.