Remove sid_length and sid_bits_per_character from default.services.yml

Probably we can remove it only when PHP 8.4 will be minimally required version as some sites can tune the seting

When core will require Symfony 7.2 looking at https://github.com/symfony/symfony/pull/57805

@andypost Drupal 11.1 should be on Symfony 7.2, waiting for beta hopefully in early November.

Thank you! The same time PHP will get GA at 21 Nov)

Was this completed in 📌 Symfony 7.2 Active ?

Separately, 🐛 Regression? PHP 8.4 session.sid_length and session.sid_bits_per_character are deprecated Active seems to be the other problem this issue intends to fix, "sites that have them explicitly set", so I marked it a duplicate.

There's at least silencing in core/.deprecation-ignore.txt and it needs to figure out more

So wait for SF 8.0 for removal deprecation in core/lib/Drupal/Core/CoreServiceProvider.php
https://git.drupalcode.org/project/drupal/-/commit/e39157a2add9041503902...

November'25-July'26 https://symfony.com/releases/8.0