Remove old DefaultArgument

generation/src/commonMain/kotlin/io/github/nomisrev/openapi/Model.kt

@@ -149,23 +149,7 @@ sealed interface Model {
  val isRequired: Boolean,
  val isNullable: Boolean,
  val description: String?
- ) {
- sealed interface DefaultArgument {
- data class Enum(val enum: Model, val context: NamingContext, val value: String) :
- DefaultArgument
-
- data class Union(val union: NamingContext, val case: Model, val value: String) :
- DefaultArgument
-
- data class Double(val value: kotlin.Double) : DefaultArgument
-
- data class Int(val value: kotlin.Int) : DefaultArgument
-
- data class List(val value: kotlin.collections.List<DefaultArgument>) : DefaultArgument
-
- data class Other(val value: String) : DefaultArgument
- }
- }
+ )
  }
 
  data class Union(