[Scoper] Remove PHP_VERSION_ID < 70400 check on scoper.php #29963

Job	Run time
PHPStan	1m 16s
Commented Code	22s
Compatible PHPStan versions	22s
Help and Version	17s
Composer Validate	25s
Detect composer dependency issues	21s
Preload php-parser Order	17s
Check no "*.php" files in rules Fixture directory	26s
Check before/after test fixture on no-changes	23s
Run with Space in Directory	22s
Finalize classes	20s
Active Classes	23s
	5m 14s

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