From 952e3974ebca0a98e7c58fa486676f38b6b349b6 Mon Sep 17 00:00:00 2001
From: Ghostkeeper <rubend@tutanota.com>
Date: Mon, 27 Nov 2017 14:22:09 +0100
Subject: [PATCH] Remove convenience handling of 'None'

Because this parameter has type checking, we'll get warned if this variable is None.

Contributes to issue CURA-4243.
---
 cura/QualityManager.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/cura/QualityManager.py b/cura/QualityManager.py
index 17d3fb652c..1f9c1b8b44 100644
--- a/cura/QualityManager.py
+++ b/cura/QualityManager.py
@@ -231,10 +231,6 @@ class QualityManager:
             if quality_definition_id is not None:
                 machine_definition = ContainerRegistry.getInstance().findDefinitionContainers(id = quality_definition_id)[0]
 
-        # for convenience
-        if material_containers is None:
-            material_containers = []
-
         if not material_containers:
             active_stacks = ExtruderManager.getInstance().getActiveGlobalAndExtruderStacks()
             if active_stacks: