Fix linting

Author: carlotaarvela

src/aks-preview/azext_aks_preview/custom.py

@@ -571,7 +571,6 @@ def __init__(self, location, resource_id):
                     error = e
                     # Wait before retry to allow workspace tables to become available
                     if attempt < 2:
-                        import time
                         time.sleep(30)
             else:
                 raise error

src/aks-preview/azext_aks_preview/managed_cluster_decorator.py

@@ -56,7 +56,6 @@
     CONST_TRANSIT_ENCRYPTION_TYPE_MTLS,
     CONST_ADVANCED_NETWORKPOLICIES_L7,
 )
-from azure.core.exceptions import HttpResponseError, ResourceExistsError
 from azext_aks_preview.azurecontainerstorage._consts import (
     CONST_ACSTOR_EXT_INSTALLATION_NAME,
     CONST_ACSTOR_V1_EXT_INSTALLATION_NAME,
@@ -101,6 +100,7 @@
 from azext_aks_preview.custom import (
     ensure_container_insights_for_monitoring_preview,
 )
+from azure.core.exceptions import HttpResponseError, ResourceExistsError
 from azure.cli.command_modules.acs._client_factory import get_graph_client
 from azure.cli.command_modules.acs._consts import (
     CONST_OUTBOUND_TYPE_LOAD_BALANCER,