Remove persistent sessions section from persistence.md

[froschdesign]

The section on persistent sessions has been removed from the documentation file persistence.md. The interface mentioned there never existed.

References:

• https://docs.mezzio.dev/mezzio-session/persistence/#persistent-sessions
• https://github.com/zendframework/zend-expressive-session/pull/28

[gsteel]

Is this section not just a case of mistaken interface name, i.e. should be changed to SessionCookiePersistenceInterface? This interface is also covered in session.md

[froschdesign]

Very confusing!

The interface SessionCookiePersistenceInterface is also listed on: https://docs.mezzio.dev/mezzio-session/session/ without further explanation.

[froschdesign]

So many pages and I don't know what to do as an end user… 🤦🏻‍♂️

[froschdesign]

I will check this again!