Path: Removes unused imports from PathToolBit.py
Path: Removes unused imports from PathToolBit.py

lgtm.com showed unused imports in PathToolBit.py.  This patch removes them.  The tests in TestPathApp still pass.

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master