[openscad] fix refine shape feature

src/Mod/OpenSCAD/OpenSCADFeatures.py

@@ -273,10 +273,9 @@ class RefineShape:
 
     def execute(self, fp):
         if fp.Base and fp.Base.Shape.isValid():
-            #import freecad.OpenSCAD.OpenSCADUtils
             import OpenSCADUtils
             sh=fp.Base.Shape.removeSplitter()
-            fp.Shape=freecad.OpenSCAD.OpenSCADUtils.applyPlacement(sh)
+            fp.Shape=OpenSCADUtils.applyPlacement(sh)
 
 class IncreaseTolerance:
     '''increase the tolerance of every vertex