chore: remove non-php code

[marcosmarcolin]

I'm mainly removing parts of the Decoder Method ->add($obj), I don't see the point in some parts, if the code being executed will generate a FATAL ERROR, non-existent class or non-existent function.

I believe it is some code that is not executed, what do you think?

[walkor]

phpsocket.io is a project I worked on a long time ago. At that time, I simply translated the code of socket.io using workerman, without delving into the internal details.