You can request the removal of your account from any workspace admin. Workspace admins can remove all levels of members from a workspace except for their own logged in user. Here's a step-by-step guide.
If the admin(s) are unreachable or you're the only user on your free workspace and you need to remove it from your account, reach out to us at help@air.inc or via chat using the messenger icon below. Be sure to include your email address and the name of the workspace you wish to remove in your message and we'll be happy to assist.