Refactor bug fixes

src/main/java/dotsandboxes/DotsAndBoxesGrid.java

@@ -115,10 +115,6 @@ public class DotsAndBoxesGrid {
                     return true;
                 }
             }
-            else {
-                return false;
-            }
-
         // A box is complete if the north and south horizontals and the east and west verticals have all been drawn
     return false;
     }