Remove redundant account data, receipts and presence requests from generic_worker docs

[evoL]

POST requests for account data, receipts and presence require the worker to be configured as a stream writer. The regular expressions in the default list don't assume any HTTP method, so if the worker is not a stream writer, the request fails.

The stream writer section of the documentation lists the same regexps as the one I'm removing, so people configuring stream writers can still configure their routing properly.

More context: #17243 (comment)

Pull Request Checklist

• Pull request is based on the develop branch
• Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
  • Use markdown where necessary, mostly for code blocks.
  • End with either a period (.) or an exclamation mark (!).
  • Start with a capital letter.
  • Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.
• Code style is correct
  (run the linters)

[CLAassistant]

All committers have signed the CLA.