Removed antialising by default, I guess this is what caused opengl regression from 7.4.0 to 7.4.1 release

Author: tpaviot

src/Display/OCCViewer.py

@@ -202,9 +202,6 @@ def Create(self, window_handle=None, parent=None, create_default_lights=True,
         # necessary for text rendering
         self._struc_mgr = self.Context.MainPrsMgr().StructureManager()
 
-        # by default, enable antialisaing
-        self.EnableAntiAliasing()
-
         # turn self._inited flag to True
         self._inited = True