lint

Signed-off-by: Tim Li <ltim@uber.com>

Author: timl3136

cadence/worker/_decision_task_handler.py

@@ -11,7 +11,6 @@
 from cadence.client import Client
 from cadence.worker._base_task_handler import BaseTaskHandler
 from cadence._internal.workflow.workflow_engine import WorkflowEngine, DecisionResult
-from cadence._internal.workflow.context import Context
 from cadence.workflow import WorkflowInfo
 from cadence.worker._registry import Registry