minor #41295 Remove constraint for PHP < 8 (jderusse)
minor #41295 Remove constraint for PHP < 8 (jderusse)

This PR was squashed before being merged into the 6.0 branch.

Discussion
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Remove constraint for PHP < 8

| Q             | A
| ------------- | ---
| Branch?       | 6.0
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Remove code check against PHP_VERSION < 8 (except for PHPUnit Bridge)

Commits
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a8c74ae3fb Remove constraint for PHP < 8

symfony/framework-bundle