Remove assert on ScreenLine (#12333)

Code is not always constructing a valid line

src/openrct2/world/Location.hpp

@@ -712,8 +712,6 @@ struct ScreenLine : public CoordsRange<ScreenCoordsXY>
     ScreenLine(const ScreenCoordsXY& leftTop, const ScreenCoordsXY& rightBottom)
         : CoordsRange<ScreenCoordsXY>(leftTop, rightBottom)
     {
-        // Make sure one of the point coords change
-        assert((std::abs(GetX1() - GetX2()) > 0) || (std::abs(GetY1() - GetY2()) > 0));
     }
 };