Remove legacy-specific host options

The need for this split has been gone since https://phabricator.apertis.org/T9905 was completed, and it's causing problems now since it only supports port 22. Instead, we can merge the options together and use the ssh:// syntax for both ostree-push variants.

https://phabricator.apertis.org/T10209

Signed-off-by: Ryan Gonzalez ryan.gonzalez@collabora.com