Remove hosting documentation for unrelated platforms

[uknownnmonitor]

Amplify hosting services documentation for unrelated platforms is misleading! like flutter, android, swift, angular js

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[ironspur5]

Agreed, incorrect documentation here. I have only seen one reference of Amplify Hosting working with Flutter for example: https://medium.com/flutter-community/hosting-flutter-web-applications-with-amplify-hosting-and-github-actions-d53ba213767.