[JS IR] Minor: eliminate unused vals

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/resolveTemporaryNames.kt

@@ -78,7 +78,6 @@ private fun JsNode.computeScopes(): Scope {
             x.name?.let { currentScope.declaredNames += it }
             val oldScope = currentScope
             currentScope = Scope().apply {
-                parent = currentScope
                 currentScope.children += this
             }
             currentScope.declaredNames += x.parameters.map { it.name }
@@ -114,8 +113,7 @@ private fun JsNode.computeScopes(): Scope {
 }
 
 private class Scope {
-    var parent: Scope? = null
     val declaredNames = mutableSetOf<JsName>()
     val usedNames = mutableSetOf<JsName>()
     val children = mutableSetOf<Scope>()
-}
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/NewNamer.kt

@@ -83,7 +83,7 @@ class NewNamerImpl(
     val context: JsIrBackendContext,
     val unit: IrToJs.CodegenUnit,
     val exportId: (IrDeclarationWithName) -> String,
-    val stableNames: Set<String>,
+    stableNames: Set<String>,
 ) : IrNamerBase() {
     val staticNames = NameTable<IrDeclaration>(
         reserved = stableNames.toMutableSet()