ClassImmutabilityAnalysis contains dead code

allSubtypes of java.lang.Object always contains all types

       // 2.
        // All classes that do not have complete superclass information are mutable
        // due to the lack of knowledge.
        val typesForWhichItMayBePossibleToComputeTheMutability =
            allSubtypes(ObjectType.Object, reflexive = true)
        val unexpectedRootTypes =
            rootTypes.filter(rt ⇒ (rt ne ObjectType.Object) && isInterface(rt).isNo)

        unexpectedRootTypes.flatMap(rt ⇒ allSubtypes(rt, reflexive = true)).view.
            // For classes that directly inherit from Object, but which also
            // implement unknown interface types it is possible to compute the class
            // immutability
            filter(ot ⇒ !typesForWhichItMayBePossibleToComputeTheMutability.contains(ot)).
            foreach(ot ⇒ project.classFile(ot) foreach { cf ⇒
                handleResult(Result(cf, MutableObjectDueToUnknownSupertypes))
            })

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