docs: remove supernova walkthrough

docs/README.md

@@ -30,7 +30,6 @@ Gno-specific features, connect to Gno apps with clients, and more.
 - [Example `minisocial` dApp](builders/example-minisocial-dapp.md) - Build a complete social media application while learning the full local development workflow for Gno packages.
 - [Deploying Gno packages](builders/deploy-packages.md) - Learn how to deploy your code to Gno.land networks using `gnokey` and understand gas requirements.
 - [Connecting clients](builders/connect-clients-and-apps.md) - Discover how to connect external applications to Gno.land networks using both Go and JavaScript clients.
-- [Stress testing with Supernova](builders/stress-testing-with-supernova.md) - Learn how to stress test your Gno network using `supernova` to measure performance.
 - [Become a Gnome](builders/become-a-gnome.md) - Learn what makes a great Gno.land contributor and how to showcase your work in the ecosystem.
 
 ## Resources

misc/docs/sidebar.json

@@ -24,7 +24,6 @@
           "builders/example-minisocial-dapp",
           "builders/deploy-packages",
           "builders/connect-clients-and-apps",
-          "builders/stress-testing-with-supernova",
           "builders/become-a-gnome"
         ]
       },