Remove Adding a new language to the highlight.js bundle instructions (#131)

These instructions are no longer relevant due to nodejs/node#34148.

Author: Derek Lewis

README.md

@@ -25,14 +25,3 @@ npm test
 1. In [node-lint-md-cli-rollup](https://github.com/nodejs/node/tree/master/tools/node-lint-md-cli-rollup), bump the `remark-preset-lint-node` dependency 
 1. In the `nodejs/node` repo, rebuild the Markdown linter (`make lint-md-rollup`)
 1. PR the `nodejs/node` repo with the updated linter
-
-### Adding a new language to the highlight.js bundle
-
-1. Visit [highlightjs.org/download](https://highlightjs.org/download/)
-1. Select [the pre-existing grammars](https://github.com/nodejs/node/tree/master/doc/api_assets#highlightpackjs) and include any additional grammar(s)
-1. Download the custom `highlight.zip` package for Node.js
-1. Extract the downloaded `highlight.zip`
-1. Copy `highlight.pack.js` into the `doc/api_assets/` directory
-1. Update the date when the bundle was downloaded at [`doc/api_assets/README.md#highlightpackjs`](https://github.com/nodejs/node/tree/master/doc/api_assets#highlightpackjs)
-1. Update [the pre-existing grammars](https://github.com/nodejs/node/tree/master/doc/api_assets#highlightpackjs) at `doc/api_assets/README.md` to include the new grammar(s)
-1. PR the `nodejs/node` repo with the updated bundle