SQUASH Quarantine logic

Author: gmarciani

tests/integration-tests/tests/ad_integration/test_ad_integration.py

@@ -28,7 +28,6 @@
 from retrying import retry
 from time_utils import seconds
 
-from pcluster.models.imagebuilder_resources import StackError
 from utils import find_stack_by_tag, generate_stack_name, is_directory_supported, random_alphanumeric
 
 from tests.ad_integration.cluster_user import ClusterUser