[IR] simplify Carriers (remove type parameters)

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/Dce.kt

@@ -386,11 +386,9 @@ fun usefulDeclarations(roots: Iterable<IrDeclaration>, context: JsIrBackendConte
                 ) {
                     declaration.enqueue(klass, "annotated by @JsName")
                 }
-            }
 
-            // TODO is this needed?
-            for (declaration in ArrayList(klass.declarations)) {
-                // TODO this is a hack.
+                // A hack to enforce property lowering.
+                // Until a getter is accessed it doesn't get moved to the declaration list.
                 if (declaration is IrProperty) {
                     fun IrSimpleFunction.enqueue(description: String) {
                         findOverriddenContagiousDeclaration()?.let { enqueue(it, description) }