fix

Author: FumingZhang

src/aks-preview/azext_aks_preview/_roleassignments.py

@@ -3,6 +3,7 @@
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # --------------------------------------------------------------------------------------------
 
+# pylint: disable=unused-import
 from azure.cli.command_modules.acs._roleassignments import (
     add_role_assignment,
     add_role_assignment_executor,