Remove SymfonyTestsListener configuration

[mamazu]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Fixed tickets	fixes
Related issues/PRs	related #7339
License	MIT
Documentation PR

What's in this PR?

Removing SymfonyTestsLister since it's being removed in PhpUnit 10 anyways.

Why?

see above

[mamazu]

Why do the tests break when I change the XML?

[alexander-schranz]

@mamazu I don't know maybe some tests relay on some functionality of the bridge: https://symfony.com/doc/current/components/phpunit_bridge.html.

But as a I know there should be for all things a replacement in PHPUnit itself or a way to workaround it https://thephp.cc/presentations/phpunit-10-for-symfony-developers

Lets check if we can change the two tests to work again on 2.5 without the listener.

[mamazu]

It looks like the problem is "perserveGlobalState". This should be off for isolated processes anyways (see: sebastianbergmann/phpunit#3954) which is probably why it runs in phpunit 10.

So what to do:

• But for the old phpunit 9 we would have to find a way to generate a listener that disabled this feature for all tests
• Introduce a base setUp method in the SuluTestcase (which could be removed when migrating to phpunit 10 anways).

But I'm open for suggestions. The line that is currently fixing that is here:
https://github.com/symfony/symfony/blob/c1bca297cf15145fff29ee169e9820ffacc5d37d/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php#L121-L123