BugID:23646814: remove jsengine_app from saml21 board
-linux_only_targets="at_app coapapp helloworld http2app jsengine_app lwm2m_app modbus_app mqttapp otaapp sal_app udata_demo.sensor_cloud_demo udata_demo.sensor_local_demo udata_demo.udata_local_demo udataapp ulocation.baseapp ulog_app yloop_app yts"
+linux_only_targets="at_app coapapp helloworld http2app lwm2m_app modbus_app mqttapp otaapp sal_app udata_demo.sensor_cloud_demo udata_demo.sensor_local_demo udata_demo.udata_local_demo udataapp ulocation.baseapp ulog_app yloop_app yts"
