Disable import-error as attrs is no longer a test dependency

cdce8p · Pierre-Sassoulas · commit c2936a541f57 · 2023-04-23T14:00:55.000+02:00
diff --git a/tests/functional/r/regression/regression_4439.py b/tests/functional/r/regression/regression_4439.py
@@ -7,7 +7,7 @@
 
 from typing import Optional
 
-from attr import attrib, attrs
+from attr import attrib, attrs  # pylint: disable=import-error
 
 
 @attrs()
