removed unneeded use statements
update year on licenses
Merge branch '2.3' into 2.4

* 2.3:
  update year on licenses
  rundown and typo fix
  [Process] Fix #9861 : Revert TTY mode
  [Form] Update minimal requirement in composer.json
  Fix Empty translations with Qt files
  Update UPGRADE-2.3.md to account for #9388

Conflicts:
	src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php