fix LintAndTest

Author: oleksandr-r-q

shells/backends/gcp_tf_backend/tests/test_gcp_tf_backend.py

@@ -1,10 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-from cloudshell.shell.core.resource_driver_interface import ResourceDriverInterface
-from cloudshell.shell.core.driver_context import InitCommandContext, ResourceCommandContext, AutoLoadResource, \
-    AutoLoadAttribute, AutoLoadDetails, CancellationContext
-from cloudshell.shell.core.session.cloudshell_session import CloudShellSessionContext
-from cloudshell.shell.core.session.logging_session import LoggingSessionContext
+from cloudshell.shell.core.driver_context import ResourceCommandContext
+
 
 """
 Tests for `GcpTfBackendDriver`