[cleanup] cleanup AbstractRector from DONT_TRAVERSE_* enums as no longer supported, all rules work without it now #31631

Job	Run time
Run with Space in Directory	23s
Preload php-parser Order	23s
Commented Code	21s
Composer Validate	31s
Compatible PHPStan versions	19s
Check fixture classes are different to nodes	18s
Active Classes	39s
PHPStan	1m 27s
Finalize classes	25s
Detect composer dependency issues	22s
Check before/after test fixture on no-changes	20s
Help and Version	22s
PHP Linter	33s
Check no "*.php" files in rules Fixture directory	23s
	6m 46s

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