Swift generated code has some redundant lines

[fadi-botros]

When you generate files using Swift generator, you find both NSCoding and toDictionary/fromDictionary

I think it could be more readable and small if the NSCoding comformance was just delegating to toDictionary and fromDictionary

Also this approach is more Objective-C than Swift, in Swift we just have Encodable/Decodable