diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 845ed0325f..e5c0c5688c 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -84,7 +84,6 @@ from cura.Settings.SettingInheritanceManager import SettingInheritanceManager
 from cura.Settings.SimpleModeSettingsManager import SimpleModeSettingsManager
 
 from cura.Machines.VariantManager import VariantManager
-from plugins.SliceInfoPlugin.SliceInfo import SliceInfo
 
 from .SingleInstance import SingleInstance
 from .AutoSave import AutoSave
@@ -110,6 +109,10 @@ from cura.ObjectsModel import ObjectsModel
 from UM.FlameProfiler import pyqtSlot
 
 
+if TYPE_CHECKING:
+    from plugins.SliceInfoPlugin.SliceInfo import SliceInfo
+
+
 numpy.seterr(all = "ignore")
 
 try:
@@ -407,43 +410,6 @@ class CuraApplication(QtApplication):
             }
         )
 
-        """
-        self._currently_loading_files = []
-        self._non_sliceable_extensions = []
-
-        self._machine_action_manager = MachineActionManager.MachineActionManager()
-        self._machine_manager = None    # This is initialized on demand.
-        self._extruder_manager = None
-        self._material_manager = None
-        self._quality_manager = None
-        self._object_manager = None
-        self._build_plate_model = None
-        self._multi_build_plate_model = None
-        self._setting_visibility_presets_model = None
-        self._setting_inheritance_manager = None
-        self._simple_mode_settings_manager = None
-        self._cura_scene_controller = None
-        self._machine_error_checker = None
-        self._auto_save = None
-        self._save_data_enabled = True
-
-        self._additional_components = {} # Components to add to certain areas in the interface
-
-        super().__init__(name = "cura",
-                         version = CuraVersion,
-                         buildtype = CuraBuildType,
-                         is_debug_mode = CuraDebugMode,
-                         tray_icon_name = "cura-icon-32.png",
-                         **kwargs)
-
-        # FOR TESTING ONLY
-        if kwargs["parsed_command_line"].get("trigger_early_crash", False):
-            assert not "This crash is triggered by the trigger_early_crash command line argument."
-
-        self._variant_manager = None
-
-        self.default_theme = "cura-light"
-        """
     # Runs preparations that needs to be done before the starting process.
     def startSplashWindowPhase(self):
         super().startSplashWindowPhase()
diff --git a/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json b/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
index bb6e631864..efb071cb8c 100644
--- a/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
+++ b/resources/extruders/raise3D_N2_plus_single_extruder_0.def.json
@@ -1,5 +1,4 @@
 {
-    "id": "raise3D_N2_plus_single_extruder_0",
     "version": 2,
     "name": "Extruder 1",
     "inherits": "fdmextruder",