fix: link rtd

Author: blackheaven

ghcide/README.md

@@ -7,30 +7,4 @@
  [`haskell-language-server`](http://github.com/haskell/haskell-language-server) is an LSP server built on top of `ghcide` with additional features and a user friendly deployment model. To get it, simply install the [Haskell extension](https://marketplace.visualstudio.com/items?itemName=haskell.haskell) in VS Code, or download prebuilt binaries from the [haskell-language-server](https://github.com/haskell/haskell-language-server) project page.
 
 
-The instructions below are meant for developers interested in setting up ghcide as an LSP server for testing purposes.
-
-### Install `ghcide`
-
-#### With Nix
-
-Note that you need to compile `ghcide` with the same `ghc` as the project you are working on.
-
-1. If the `ghc` you are using matches the version (or better is) from `nixpkgs` it‘s easiest to use the `ghcide` from `nixpkgs`. You can do so via
-   ```
-   nix-env -iA haskellPackages.ghcide
-   ```
-   or e.g. including `pkgs.haskellPackages.ghcide` in your projects `shell.nix`.
-   Depending on your `nixpkgs` channel that might not be the newest `ghcide`, though.
-
-2. If your `ghc` does not match nixpkgs you should try the [ghcide-nix repository](https://github.com/cachix/ghcide-nix)
-   which provides a `ghcide` via the `haskell.nix` infrastructure.
-
-#### With Cabal or Stack
-
-First install the `ghcide` binary using `stack` or `cabal`, e.g.
-
-1. `git clone https://github.com/haskell/ghcide.git`
-2. `cd ghcide`
-3. `cabal install` or `stack install` (and make sure `~/.local/bin` is on your `$PATH`)
-
-It's important that `ghcide` is compiled with the same compiler you use to build your projects.
+Set-up and usage instructions can be found on [haskell-language-server documentation](https://haskell-language-server.readthedocs.io/en/stable/components/ghcide.html)