Draft: remove faulty code from importDXF.py

The Group property of the 'new' layer object is not an attribute of its Proxy.

src/Mod/Draft/importDXF.py

@@ -1928,16 +1928,7 @@ def addObject(shape, name="Shape", layer=None):
         newob = shape
     if layer:
         lay = locateLayer(layer)
-        # For old style layers, which are just groups
         if hasattr(lay, "Group"):
-            pass
-        # For new Draft Layers
-        elif hasattr(lay, "Proxy") and hasattr(lay.Proxy, "Group"):
-            lay = lay.Proxy
-        else:
-            lay = None
-
-        if lay != None:
             if lay not in layerObjects:
                 l = []
                 layerObjects[lay] = l
@@ -1945,8 +1936,6 @@ def addObject(shape, name="Shape", layer=None):
                 l = layerObjects[lay]
             l.append(newob)
 
-
-
     formatObject(newob)
     return newob