fix: OOM crash in RemoveUnusedVariableAssignRector #32429

Job	Run time
Check before/after test fixture on no-changes	20s
Preload php-parser Order	16s
Commented Code	23s
PHPStan	52s
Composer Validate	19s
Check fixture classes are different to nodes	16s
Run with Space in Directory	22s
Check no "*.php" files in rules Fixture directory	20s
PHP Linter	27s
Finalize classes	18s
Active Classes	23s
Avoid duplicate short class names	15s
Compatible PHPStan versions	18s
Help and Version	17s
Detect composer dependency issues	18s
	5m 24s

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