Remove roadmap

We currently have none written, so it makes no sense to pretend.

content/about/roadmap.md

@@ -1,45 +0,0 @@
----
-title: Roadmap
-linktitle: Roadmap
-description: Take a look at what's in the pipeline for future versions of the Hugo project.
-date: 2017-02-01
-publishdate: 2017-02-01
-lastmod: 2017-02-01
-categories: [about hugo]
-keywords: [about,contribute,roadmap]
-menu:
-  docs:
-    parent: "about"
-    weight: 50
-weight: 50
-sections_weight: 50
-draft: false
-aliases: [/meta/roadmap]
-toc: false
----
-
-See the Hugo [GitHub Milestones][milestones].
-
-We are not too far away from Hugo 1.0.
-
-[bep](https://github.com/bep/) currently leads the Hugo development. The roadmap is in his head.
-
-## Contributions Welcome
-
-Feel free to [contribute to Hugo's development][devcontribute], [improve Hugo's documentation][doccontribute], or [open a new issue][newissue] if you have an idea for a new feature.
-
-[#98]: https://github.com/gohugoio/hugo/issues/98
-[#1014]: https://github.com/gohugoio/hugo/issues/1014
-[#1435]: https://github.com/gohugoio/hugo/issues/1435
-[#1436]: https://github.com/gohugoio/hugo/issues/1436
-[devcontribute]: /contribute/development/
-[doccontribute]: /contribute/documentation/
-[hosting and deployment]: /hosting-and-deployment/
-[migrate]: /tools/migrations/
-[milestones]: https://github.com/gohugoio/hugo/milestones/
-[newissue]: https://github.com/gohugoio/hugo/issues/
-[related forum thread]: https://discourse.gohugo.io/t/web-based-editor/155
-[themes]: /themes/
-[themescontrib]: /contribute/themes/
-[tutorials]: /tutorials
-[***your*** best ideas!]: /contribute/