Removed BINDING_VERSION from Api.js (not necessary)

Author: Chris Park

lib/Api.js

@@ -30,13 +30,6 @@ var language = require("./language");
 var ping = require("./ping");
 var info = require("./info");
 
-/**
- * Compatible server version.
- *
- * @type string
- */
-var BINDING_VERSION = "1.1";
-
 /**
  * @class
  *