docs(website): removed documentation around pre-compiling styles

This should no longer be an issue when using `@use "react-md";`

packages/documentation/src/guides/advanced-installation.md

@@ -88,97 +88,6 @@ To use the UMD bundle, choose either the font or svg icon bundle and a new
 Check out the #material-icons package for more information about the separate
 icon components.
 
-## Pre-compiling the base react-md styles for quicker builds
-
-The initial build for `react-md` styles can take awhile since it does a lot
-behind the scenes to validate the different colors, contrast ratios, and other
-things to prevent errors. Since you won't really be changing the `react-md`
-styles much once you've defined your theme or other custom overrides, you can
-speed up this process by just pre-building the base `react-md` CSS file. If you
-are using all the default "feature flags" within `react-md`, you can use one of
-the [CDN hosted pre-compiled themes](/guides/cdn-links#pre-compiled-themes).
-
-If you have changed more than just the color variables and the light/dark theme
-toggle, you'll need to manually compile the base `react-md` styles yourself. The
-[including styles without webpack] guide will go into full details for this, but
-here's a quick version.
-
-First, install `node-sass` if you haven't already:
-
-```sh
-npm install --save-dev node-sass
-```
-
-Or with `yarn`:
-
-```sh
-yarn add --dev node-sass
-```
-
-Next, create a new `src/react-md.scss` file that will import the `react-md`
-library along with your variable overrides:
-
-```scss
-@import "./my-custom-variables";
-
-// or just define them in this file
-$rmd-list-vertical-padding: 0.565rem;
-$rmd-icon-use-font-icons: false;
-$rmd-icon-icon-spacing-with-text: 0.75rem;
-
-@import "react-md/dist/scss/styles";
-```
-
-> Note that there is no leading tilde (`~`) for the `@import` statement for the
-> react-md styles file along with now being `dist/scss` instead of just `dist`.
-> This is to work without webpack.
-
-Next, create a new script in your `package.json` to compile the base styles:
-
-```diff
-   "scripts": {
-     "start": "react-scripts start",
-+    "styles": "node-sass --include-path=node_modules src/react-md.scss src/react-md.css",
-     "build": "react-scripts build",
-     "test": "react-scripts test",
-     "eject": "react-scripts eject"
-   },
-```
-
-> Note that `node-sass` is run with `--include-path=node_modules`. This is
-> required now that it is being compiled without webpack.
-
-Run the new `styles` script to generate your `src/index.css` file:
-
-```sh
-npm run styles
-```
-
-Or with `yarn`:
-
-```sh
-yarn styles
-```
-
-Finally, update the `src/index.js` to include the newly created `react-md.css`
-file:
-
-```diff
-+import './react-md.css';
- import React from 'react';
- import ReactDOM from 'react-dom';
- import './index.css';
- import App from './App';
- import * as serviceWorker from './serviceWorker';
-```
-
-You're done! The normal build process will now include the newly compiled
-`react-md.css` file and handle the auto-prefixing based on the `browserlist`.
-Depending on your preference, you can commit this generated file to `git` if you
-know it won't change much, add a `postinstall` script to automatically generate
-this file for you, or use something like [npm-run-all] to run the `styles`
-command before the `react-scripts start`.
-
 ## Self-hosting the fonts
 
 Sometimes it might not be ideal to use [Google Fonts] for providing the fonts