Removed heka

https://github.com/mozilla-services/heka

From the [Readme](https://github.com/mozilla-services/heka): This project is deprecated. Please see [this email](https://mail.mozilla.org/pipermail/heka/2016-May/001059.html) for more details.

README.md

@@ -1253,7 +1253,6 @@ Software written in Go.
 * [gocc](https://github.com/goccmack/gocc) - Gocc is a compiler kit for Go written in Go.
 * [GoDocTooltip](https://github.com/diankong/GoDocTooltip) - A chrome extension for Go Doc sites, which shows function description as tooltip at funciton list.
 * [Gor](https://github.com/buger/gor) - Http traffic replication tool, for replaying traffic from production to stage/dev environments in real-time.
-* [heka](https://github.com/mozilla-services/heka) - universal tool for data processing from Mozilla. Large collection of built-in plugins. Extendable via Go and Lua plugin API.
 * [hsync](http://ambrevar.bitbucket.org/hsync/) - A filesystem hierarchy synchronizer.
 * [hugo](http://gohugo.io/) - A Fast and Modern Static Website Engine.
 * [ipe](https://github.com/dimiro1/ipe) - An open source Pusher server implementation compatible with Pusher client libraries written in GO.