MB-8725 Update notes for things to uninstall to indicate it's optional

Remove list of things that aren't version managers since those are standalone and the real list is longer (as pointed out in pr comments). Left the version manager section since those can take multiple steps.

README.md

@@ -250,20 +250,14 @@ If you need help with this setup, you can ask for help in the
 
 #### Nix: Clean Up Local Env
 
-This section is only if you had previously set up any of these tools/packages.
+This section is only if you had previously set up any of these tools/packages. It is also optional, with the following
+the caveat of this note:
 
-NOTE: If you need any of the packages/tools for other things that you won't use `nix` for, you can possibly set things
-up so that they both work, but you'll just have to set up your `PATH` properly. And even then, there may be other steps
-necessary which aren't documented here.
+:warning: NOTE: If you need any of the packages/tools for other things that you won't use `nix` for, you can set things
+up so that they both work side by side, but you'll just have to set up your `PATH` properly. And even then, there may be
+other steps necessary which aren't documented here.
 
-1. If you had previously been using `direnv`, `awscli`, `aws-vault`, `chamber`, and `pre-commit` installed via
-   `homebrew`, uninstall them.
-
-    ```shell
-    brew uninstall direnv awscli aws-vault chamber pre-commit
-    ```
-
-1. Make sure you have disabled or uninstalled `nodenv`, `asdf` or any other version switchers for `mymove`.
+1. Disable or uninstall `nodenv`, `asdf` or any other version switchers for `mymove`.
     1. `nodenv`:
         1. TLDR (disable only): remove `eval "$(nodenv init -)"` from `.zshrc` (or your shell's config file)
         1. Full instructions: [Uninstalling nodenv](https://github.com/nodenv/nodenv#uninstalling-nodenv)