gui: setParent(None) before deleteLater() to remove dock appears unnecessary and causes memory corruption on Windows. Closes #362

artiq/gui/applets.py

@@ -167,7 +167,6 @@ class _AppletDock(QDockWidgetCloseDetect):
         self.starting_stopping = False
 
         if delete_self:
-            self.setParent(None)
             self.deleteLater()
 
     async def restart(self):

artiq/gui/log.py

@@ -356,7 +356,6 @@ class LogDockManager:
 
     def on_dock_closed(self, name):
         dock = self.docks[name]
-        dock.setParent(None)
         dock.deleteLater()
         del self.docks[name]
         self.update_closable()