Update README.md

Author: paveltiunov

README.md

@@ -1,12 +1,6 @@
 <p align="center">
   <a href="https://cube.dev?ref=github-readme"><img src="https://raw.githubusercontent.com/cube-js/cube/master/docs/content/cube-logo-with-bg.png" alt="Cube — Semantic Layer for Data Applications" width="300px"></a>
 </p>
-
-<p align="center">
-  <a href="https://cube.registration.goldcast.io/events/e0bdd44b-6e9a-4581-be45-9b46fae010b8?ref=github-readme">
-    <img src="https://ucarecdn.com/459df450-5984-42da-9211-a1d70a96e6a5/"/>
-  </a>
-</p>
 <br/>
 
 [Website](https://cube.dev?ref=github-readme) • [Getting Started](https://cube.dev/docs/getting-started?ref=github-readme) • [Docs](https://cube.dev/docs?ref=github-readme) • [Examples](https://cube.dev/docs/examples?ref=github-readme) • [Blog](https://cube.dev/blog?ref=github-readme) • [Slack](https://slack.cube.dev?ref=github-readme) • [Twitter](https://twitter.com/the_cube_dev)