updated: readme file

Author: GianlucaGuarini

README.md

@@ -16,7 +16,6 @@ Timer | [Source](timer) | [Demo](https://riot.js.org/examples/plunker/?app=timer
 Todo | [Source](todo-app) | [Demo](https://riot.js.org/examples/plunker/?app=todo-app)
 Todo (pre-compiled) | [Source](todo-app-precompiled) | [Demo](https://riot.js.org/examples/todo-app-precompiled/)
 Color Palette | [Source](color-palette) | [Demo](https://riot.js.org/examples/plunker/?app=color-palette)
-Observables | [Source](observables) | [Demo](https://riot.js.org/examples/plunker/?app=observables)
 Router - Page switcher | [Source](router-page-switcher) | [Demo](https://riot.js.org/examples/plunker/?app=router-page-switcher)
 Animated list reordering | [Source](animated-list-reordering) | [Demo](https://riot.js.org/examples/plunker/?app=animated-list-reordering)
 Simple modal | [Source](modal) | [Demo](https://riot.js.org/examples/plunker/?app=modal)