Merge pull request #9781 from Ultimaker/CURA-8146_Fix_getting_PyCapsule_error_on_import

CURA-8146: Fix getting PyCapsule error on import

cura_app.py

@@ -16,14 +16,6 @@ import argparse
 import faulthandler
 import os
 
-# Workaround for a race condition on certain systems where there
-# is a race condition between Arcus and PyQt. Importing Arcus
-# first seems to prevent Sip from going into a state where it
-# tries to create PyQt objects on a non-main thread.
-import Arcus  # @UnusedImport
-import Savitar  # @UnusedImport
-import pynest2d # @UnusedImport
-
 from PyQt5.QtNetwork import QSslConfiguration, QSslSocket
 
 from UM.Platform import Platform

plugins/PostProcessingPlugin/__init__.py

@@ -1,14 +1,6 @@
 # Copyright (c) 2020 Jaime van Kessel, Ultimaker B.V.
 # The PostProcessingPlugin is released under the terms of the AGPLv3 or higher.
 
-# Workaround for a race condition on certain systems where there
-# is a race condition between Arcus and PyQt. Importing Arcus
-# first seems to prevent Sip from going into a state where it
-# tries to create PyQt objects on a non-main thread.
-import Arcus  # @UnusedImport
-import Savitar  # @UnusedImport
-import pynest2d  # @UnusedImport
-
 from . import PostProcessingPlugin
 
 

plugins/UM3NetworkPrinting/src/__init__.py

@@ -1,9 +1,2 @@
 # Copyright (c) 2019 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-
-# Workaround for a race condition on certain systems where there
-# is a race condition between Arcus and PyQt. Importing Arcus
-# first seems to prevent Sip from going into a state where it
-# tries to create PyQt objects on a non-main thread.
-import Arcus #@UnusedImport
-import Savitar #@UnusedImport