JVM IR: use a simpler way to check if class is local

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrTypeMapping.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.backend.jvm.codegen
 import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.signature.JvmSignatureWriter
 import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.types.IrSimpleType
 import org.jetbrains.kotlin.ir.types.IrType
@@ -62,7 +63,7 @@ private fun IrSimpleType.buildPossiblyInnerType(classifier: IrClass?, index: Int
 
     val toIndex = classifier.typeParameters.size + index
     if (!classifier.isInner) {
-        assert(toIndex == arguments.size || classifier.isLocalClass()) {
+        assert(toIndex == arguments.size || classifier.visibility == Visibilities.LOCAL) {
             "${arguments.size - toIndex} trailing arguments were found in this type: ${render()}"
         }
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -272,17 +272,6 @@ val IrDeclaration.parentAsClass: IrClass
     get() = parent as? IrClass
         ?: error("Parent of this declaration is not a class: ${render()}")
 
-fun IrClass.isLocalClass(): Boolean {
-    var current: IrDeclarationParent? = this
-    while (current != null && current !is IrPackageFragment) {
-        if (current is IrDeclarationWithVisibility && current.visibility == Visibilities.LOCAL)
-            return true
-        current = (current as? IrDeclaration)?.parent
-    }
-
-    return false
-}
-
 tailrec fun IrElement.getPackageFragment(): IrPackageFragment? {
     if (this is IrPackageFragment) return this
     return when (val parent = (this as? IrDeclaration)?.parent) {