message: Remove Edge from browser support statements
  At the current time, we do not intend to do additional work specifically to
  support Edge.  If it works for most use cases, that's great, but we do not
  intend to fix issues that affect only Edge.
  Fixes
diff: @@ -25,7 +25,6 @@ Developer Guide
  Platform Targets:
  * Chrome, Firefox and Safari.
  - * Edge should also work, but we're not testing it proactively.
  * WebRTC features (VoIP and Video calling) are only available in Chrome & Firefox.
  * Mobile Web is not currently a target platform - instead please use the native
  iOS (https://github.com/matrix-org/matrix-ios-kit) and Android
  