Note that
Only administrator inside SalesScreen has the possibility to delete a board
By deleting a board, the widgets inside that board will also be deleted
The first step is to navigate to the Dashboard located in the left side menu.
Now click on Manage Boards in the top right corner.
Click on the three dots next to the board you want to delete, then click Delete.
Confirm the deletion by entering the name of the board in the box and press Delete board
The board is now deleted from your dashboard.