revert PR 36804 'Create additional HTTP servers'

[mshustov]

Summary

#36907 is on hold. It is not pragmatic to maintain code that won't be used any time soon, so I revert #36804
we can introduce those changes again when needed.

Did revert manually, since didn't manage to apply automatic one.

Checklist

Use strikethroughs to remove checklist items you don't feel are applicable to this PR.

• [ ] This was checked for cross-browser compatibility, including a check against IE11
• [ ] Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• [ ] Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• [ ] This was checked for keyboard-only and screenreader accessibility

For maintainers

• This was checked for breaking API changes and was labeled appropriately
• This includes a feature addition or change that requires a release note and was labeled appropriately

Dev docs

New platform HTTP service no longer provides createNewServer method.

[elasticmachine]

Pinging @elastic/kibana-platform

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request