Remove broken link to hangouts bridge

Fixes https://github.com/matrix-org/matrix-doc/issues/1005

supporting-docs/projects/2016-10-16-hangouts-bridge.md

@@ -1,13 +0,0 @@
----
-layout: project
-title: Hangouts Bridge
-categories: projects as
-author: CyrusTheHedgehog
-maturity: Alpha
----
-
-# {{ page.title }}
-This project creates a bridge between Google Hangouts and Matrix. It was originally developed as part of the 2016 Global TADHack - see related [blogpost](https://matrix.org/blog/2016/10/20/tadhack-global-2016/) and [video of the presentation](https://www.youtube.com/watch?v=X41RbOKTrbE&t=17m31s). 
-
-You can get the source from [GitHub](https://github.com/CyrusTheHedgehog/Hangouts-Bridge).
-