Update FileCachedSourceLocator.php

Author: staabm

src/Reflection/BetterReflection/SourceLocator/FileCachedSourceLocator.php

@@ -28,8 +28,6 @@ final class FileCachedSourceLocator implements SourceLocator
 	/** @var array{classes: array<string, ?Reflection>, functions: array<string, ?Reflection>, constants: array<string, ?Reflection>}|null */
 	private ?array $cachedSymbols = null;
 
-	private bool $storeOnShutdown = false;
-
 	/**
 	 * @param non-empty-string $cacheKey
 	 */