readme: remove broken roadmap link
The ROADMAP.md file was deleted as a part of commit
and the readme
file was not updated. I could not find a suitable alternative
resource so I am removing the link.
@@ -159,7 +159,7 @@ Now it's time to dig into the full etcd API and other guides.
- Mailing list: [etcd-dev](https://groups.google.com/forum/?hl=en#!forum/etcd-dev)
- IRC: #[etcd](irc://irc.freenode.org:6667/#etcd) on freenode.org
-- Planning/Roadmap: [milestones](https://github.com/etcd-io/etcd/milestones), [roadmap](./ROADMAP.md)
+- Planning: [milestones](https://github.com/etcd-io/etcd/milestones)
- Bugs: [issues](https://github.com/etcd-io/etcd/issues)
## Contributing
