[cleanup] cleanup AbstractRector from DONT_TRAVERSE_* enums as no longer supported, all rules work without it now #31633

Job	Run time
Run with Space in Directory	28s
Active Classes	31s
Composer Validate	21s
Preload php-parser Order	22s
Check before/after test fixture on no-changes	25s
Finalize classes	34s
Compatible PHPStan versions	25s
Commented Code	29s
PHPStan	1m 31s
Check fixture classes are different to nodes	20s
PHP Linter	35s
Help and Version	27s
Check no "*.php" files in rules Fixture directory	27s
Detect composer dependency issues	40s
	7m 35s

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