You can delete or archive a project from your Workspace.
Doing so is simple. Just hover over the project card that you'd like to delete as shown in the image below.
Clicking on the 🗑️ icon will delete a project while clicking on 🗃️ will archive it.
You can access deleted projects from the 🗑️ DELETED icon you see at the bottom.
Similarly for archived projects you can anytime view a project by clicking 🗃️ ARCHIVED and also unarchive a project if necessary.