[experiment] skip beforeTraverse() and afterTraverse() as never used #31866

Job	Run time
PHPStan	1m 31s
Commented Code	19s
Run with Space in Directory	23s
Active Classes	24s
Composer Validate	27s
Preload php-parser Order	21s
Check fixture classes are different to nodes	16s
Help and Version	23s
Detect composer dependency issues	26s
Compatible PHPStan versions	21s
Check no "*.php" files in rules Fixture directory	18s
Check before/after test fixture on no-changes	22s
PHP Linter	29s
Finalize classes	26s
	6m 26s

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