Note class-labelling todos resolved

Type arguments: yes outer classes can have arguments; they are appended after the full name.

String concatenation: this used to be worse before this unquoted version of the function existed; I think that's what the comment was complaining about.

java/kotlin-extractor/src/main/kotlin/KotlinUsesExtractor.kt

@@ -806,8 +806,6 @@ open class KotlinUsesExtractor(
         val cls = c.name.asString()
         val label = when (val parent = c.parent) {
             is IrClass -> {
-                // todo: fix this. Ugly string concat to handle nested class IDs.
-                // todo: Can the containing class have type arguments?
                 "${getUnquotedClassLabel(parent, listOf()).classLabel}\$$cls"
             }
             is IrFunction -> {