[attribute] Remove unused AttributeKey::REPRINT_RAW_VALUE #31489

Job	Run time
Run with Space in Directory	25s
PHPStan	1m 22s
Preload php-parser Order	19s
Composer Validate	21s
Finalize classes	27s
Help and Version	34s
Detect composer dependency issues	17s
Active Classes	21s
Commented Code	24s
Compatible PHPStan versions	19s
Check no "*.php" files in rules Fixture directory	21s
Check fixture classes are different to nodes	18s
Check before/after test fixture on no-changes	25s
PHP Linter	33s
	6m 26s

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