Use effective modality for enum class in JVM_IR

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

@@ -290,11 +290,6 @@ private fun MemberDescriptor.calcModalityFlag(): Int {
 
 private val MemberDescriptor.effectiveModality: Modality
     get() {
-        if (this is ClassDescriptor && kind == ClassKind.ENUM_CLASS) {
-            if (DescriptorUtils.hasAbstractMembers(this)) {
-                return Modality.ABSTRACT
-            }
-        }
         if (DescriptorUtils.isSealedClass(this) ||
             DescriptorUtils.isAnnotationClass(this)
         ) {