Is posting/config.go a deprecated file?

[MakDon]

It seems that posting/config.go is a deprecated file, because:

• There's only the definition of struct Options and var Config Options in this file.
• The only instance of Options is the Config variable in this file.
• The Config is only referenced in this and this testing initialization, which makes no effect.

So should we remove this file and its references? Or just reserve it for compatibility?