Remove duplicate call to wake a remote destination when using federation sending worker

[realtyem]

...and remove some additional code that appears to be 'dead' now. Please read actual commit messages for details.

Pull Request Checklist

• [x] Pull request is based on the develop branch
• [x] Pull request includes a changelog file.
• [x] Pull request includes a sign off
• [x] Code style is correct (run the linters)

Signed-off-by: Jason Little realtyem@gmail.com