Fix duplicate "swarm mode" heading
@@ -45,9 +45,6 @@ Upgrading from Docker 1.13.1 to 17.03.0 is expected to be simple and low-risk.
### Swarm Mode
* Shutdown leaks an error when the container was never started [#31279](https://github.com/docker/docker/pull/31279)
-
-### Swarm Mode
-
* Fix possibility of tasks getting stuck in the "NEW" state during a leader failover [docker/swarmkit#1938](https://github.com/docker/swarmkit/pull/1938)
* Fix extraneous task creations for global services that led to confusing replica counts in `docker service ls` [docker/swarmkit#1957](https://github.com/docker/swarmkit/pull/1957)
* Fix problem that made rolling updates slow when `task-history-limit` was set to 1 [docker/swarmkit#1948](https://github.com/docker/swarmkit/pull/1948)
