[cleanup] cleanup AbstractRector from DONT_TRAVERSE_* enums as no longer supported, all rules work without it now #31629

Job	Run time
Help and Version	27s
Composer Validate	22s
Run with Space in Directory	20s
PHPStan	1m 23s
Commented Code	18s
Active Classes	43s
Check no "*.php" files in rules Fixture directory	24s
Check before/after test fixture on no-changes	22s
Check fixture classes are different to nodes	17s
PHP Linter	32s
Preload php-parser Order	19s
Compatible PHPStan versions	20s
Finalize classes	23s
Detect composer dependency issues	22s
	6m 32s

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