Click on the hamburger menu in the top-left corner of your map to go to your Project Settings.
Click on Admin
Choose "Delete project"
Delete a map
There's three ways to delete a map:
Click on the first dropdown in the top-left corner, hover over a map title and and click on the Trash icon off to the right.
Right-click on your map > click on Map > choose "Delete map".
Click on the three dots in the top-right corner of the map sidebar to go to Map Settings > choose "Delete map". If your map profile doesn't show, make sure to de-select any items in your map by clicking on a blank space in your map and/or click on the three dots in the center of the left side of your map.
Delete a view
There's three ways to delete a view:
Click on the second dropdown in the top-left corner, hover over a view title and and click on the Trash icon off to the right.
Right-click on your map > click on View > choose "Delete view".
Click the Settings button on the right side of your map to open the Basic Editor > click on the three dots in the top-right corner for your View Settings > choose "Delete view".