Remove hipchat notification from appveyor

Author: istanishev

.appveyor.yml

@@ -39,12 +39,4 @@ deploy:
     secure: yTOxOoZJKPt3DWkzK//Q40wpWi89b9+jbPkNdcjVrO4u9Q6v+px0K2jSRhGnIu6F
   artifact: Dlls, Documentation
   on:
-    branch: /release/.*/
-notifications:
-- provider: HipChat
-  room: Awesome Source
-  auth_token:
-    secure: Bom1JR9YuKXK/fN7SW+R0LMb6KqYZEo2dJDnuoMxdfU=
-  on_build_success: true
-  on_build_failure: true
-  on_build_status_changed: false
+    branch: /release/.*/