remove JSONCodable protocol

[emilwojtaszek]

I've bumped into a problem while using xcode9. Error I was getting was:

'JSONDecoder' is ambiguous for type lookup in this context

The only way to fix this is to put class in proper namespace by add prefix JSONCodable like JSONCodable.JSONDecoder, but there is a problem that compiler want to use protocol called the same, not lib name

the only idea I've figure out is to remove this protocol

[pronebird]

I'd really like that patch if it works.

[valerianb]

In the file that produces that error, you can also do import class JSONCodable.JSONDecoder It disambiguates what you are referencing for Xcode !