Drop deprecated nested classes from Kotlin metadata annotations

compiler/testData/codegen/boxWithStdlib/reflection/classes/classSimpleName.kt

@@ -5,7 +5,7 @@ class Klass
 fun box(): String {
     assertEquals("Klass", Klass::class.simpleName)
     assertEquals("Date", java.util.Date::class.simpleName)
-    assertEquals("Kind", kotlin.jvm.internal.KotlinSyntheticClass.Kind::class.simpleName)
+    assertEquals("ObjectRef", kotlin.jvm.internal.Ref.ObjectRef::class.simpleName)
     assertEquals("Void", java.lang.Void::class.simpleName)
 
     return "OK"