chore(docs): Remove automated section on MJML migration (#1775)

Author: gabrielmfern

apps/docs/getting-started/migrating-to-react-email.mdx

@@ -10,15 +10,9 @@ import NextSteps from '../snippets/next-steps.mdx';
 
 ## From MJML
 
-### Manual
-
 1. Remove the `mjml` npm package and install `react-email` and `@react-email/components`
 2. Find all MJML templates ending with the `.mjml` extension and convert these to React components with the `.tsx` or `.jsx` extension.
 3. Replace MJML standard component tags with React Email component tags where possible, including `<Text>`, `<Img>`, `<Button>` etc.
 4. Convert custom MJML components with the `.js` extension to React components with the `.tsx` or `.jsx` extension.
 
-### Automated
-
-If you have a lot of MJML files to convert, this migration can be quite tedious!  You can also automate this process with Second's [MJML → React Email](https://www.second.dev) migration module.  Just connect Second to your GitHub repo, run the module, and get a pull request.
-
 <NextSteps/>