avoid duplicating links in documentation

Because one might forget to update them. I did, initially, which is why
I'm making this change.

docs/deploying.md

@@ -1,8 +1,3 @@
 # Deployment options
 
-There are several ways to deploy a Conduit server.
-
-- [Simple (Recommended)](deploying/simple.md) - This is the recommended way to set up Conduit.
-- [Debian](deploying/debian.md) - If you're using a debian-based system, you may find the `deb` package useful.
-- [Docker](deploying/docker.md) - We provide multi-arch OCI images for Conduit.
-- [Nix](deploying/nix.md) - Nix flake based setup.
+This chapter describes various ways to deploy Conduit.