Cache: constant NamespaceSeparator is private

Author: dg

src/Caching/Cache.php

@@ -45,10 +45,7 @@ class Cache
 		NAMESPACES = self::Namespaces,
 		ALL = self::All;
 
-	/** @internal */
-	public const
-		NamespaceSeparator = "\x00",
-		NAMESPACE_SEPARATOR = self::NamespaceSeparator;
+	private const NamespaceSeparator = "\x00";
 
 	private Storage $storage;