Remove obsolete dojoup shell installer

.devcontainer/devcontainer.json

@@ -37,6 +37,6 @@
 	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
 	// "remoteUser": "vscode",
 	"remoteEnv": {
-		"PATH": "${containerEnv:PATH}:/workspace/dojo/target/release:/home/vscode/.dojo/bin"
+		"PATH": "${containerEnv:PATH}:/workspace/dojo/target/release"
 	}
 }

bin/sozo/README.md

@@ -1,4 +1,4 @@
-# `dojoup`
+# `sozo`
 
 ```sh
 curl -L https://install.dojoengine.org | bash

dojoup/README.md

@@ -1,22 +1,16 @@
-# `dojoup`
+# Dojo Toolchain Installer
+
+Install the Dojo toolchain using [asdf](https://asdf-vm.com):
 
 ```sh
 curl -L https://install.dojoengine.org | bash
 ```
 
-For more details, you can then issue the following command:
+This installs the following tools via asdf plugins:
 
-```sh
-dojoup --help
-```
+- [sozo](https://github.com/dojoengine/asdf-sozo)
+- [katana](https://github.com/dojoengine/asdf-katana)
+- [torii](https://github.com/dojoengine/asdf-torii)
+- [saya](https://github.com/dojoengine/asdf-saya)
 
 [Documentation](https://book.dojoengine.org/getting-started#getting-started)
-
-## Working with Dojoup
-
-To test dojoup, there are two options:
-
-1. Use the `dojoup/Dockerfile` to build a Docker image and run the post-install check.
-2. Use the workflow `dojoup.yml` to run the post-install check on a runner.
-
-Currently, dojoup are bash programs being downloaded and executed. Probably in a near future, only the install script will be downloaded and the dojoup logic will be inside a rust binary.