remove duplicated node checker from EM list (autowarefoundation#587)

Author: saka1-s

autoware_launch/config/system/system_error_monitor/system_error_monitor.param.yaml

@@ -49,7 +49,7 @@
         /autoware/system/emergency_stop_operation: default
         /autoware/system/service_log_checker: { sf_at: "warn", lf_at: "none", spf_at: "none" }
         /autoware/system/resource_monitoring: { sf_at: "warn", lf_at: "none", spf_at: "none" }
-        /autoware/system/duplicated_node_checker: default
+        # /autoware/system/duplicated_node_checker: default
         /autoware/system/fms_connection: { sf_at: "warn", lf_at: "none", spf_at: "none" }
 
         # Vehicle (from vehicle.param.yaml in universe and vehicle.param.yaml in system_launch)