To remove a lot line from the project: 

  1. Click the Remove button in the Home ribbon.
  2. Choose Lot Line from the menu.  The mouse pointer will be displayed as a hand when placed over a lot line.  Place the mouse pointer over the  lot line to be removed and click the left mouse button to remove it.
  3. Repeat steps 1 and 2 to remove additional lot lines. 

NOTE:  This feature is only available in Professional and Enterprise versions.