PHPUnit Bridge SetUpTearDownTrait got removed in 6.0

[mvhirsch]

The mentioned Trait got removed in 6.0 (symfony/symfony#41302). I suggest the whole paragraph can be removed in 6.0 and higher, too?

See: https://symfony.com/doc/6.0/components/phpunit_bridge.html#removing-the-void-return-type

[javiereguiluz]

Michael, thanks for your issue report, which contained all the needed information and references. It was perfect!

I propose to fix this in two ways: in #16860 we're adding the deprecation notice in 5.4 branch ... and when merging this into upper branches, we'll remove the paragraph entirely, as you proposed. Thanks!

[mvhirsch]

That's the reason why I love the symfony community: efficient, friendly, ... please stay like this @javiereguiluz !