Add fallback value for AWS Lambda executor end_wait_timeout config

Author: sunank200

providers/amazon/src/airflow/providers/amazon/aws/executors/aws_lambda/lambda_executor.py

@@ -92,9 +92,7 @@ def __init__(self, *args, **kwargs):
 
     def start(self):
         """Call this when the Executor is run for the first time by the scheduler."""
-        check_health = conf.getboolean(
-            CONFIG_GROUP_NAME, AllLambdaConfigKeys.CHECK_HEALTH_ON_STARTUP, fallback=True
-        )
+        check_health = conf.getboolean(CONFIG_GROUP_NAME, AllLambdaConfigKeys.CHECK_HEALTH_ON_STARTUP)
 
         if not check_health:
             return