[SRM-295] Revert addition of multiple skip links

[dylankelly]

Motivation and Context

JIRA issue: https://digital-engagement.atlassian.net/browse/SDPA-

Changed

1. Fix for Back to top button not working due to mismatching Id's
2. Removes support for multiple back to top buttons.

Screenshots

How Has This Been Tested?

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist

• [ ] I've added relevant changes to the documentation.
• [ ] I have added tests to cover my changes (if not applicable, please state why)
• [ ] My change requires a template update for create-ripple-app.
• [ ] I have added template update script for next release.