fix(server): remove task.scheduler_type

Author: Tsukilc

docker/configs/server2-conf/graphs/hugegraph.properties

@@ -13,7 +13,6 @@ serializer=binary
 pd.peers=127.0.0.1:8686,127.0.0.1:8687,127.0.0.1:8688
 
 # task config
-task.scheduler_type=local
 task.schedule_period=10
 task.retry=0
 task.wait_timeout=10