Move the code to native

lib/browser/api/session.js

@@ -14,15 +14,9 @@ Object.defineProperties(exports, {
   }
 })
 
-const sessions = []
-
 // Wraps native Session class.
 _setWrapSession(function (session) {
   // Session is an EventEmitter.
   Object.setPrototypeOf(session, EventEmitter.prototype)
   app.emit('session-created', session)
-
-  // The Sessions should never be garbage collected, since the common pattern is
-  // to use partition strings, instead of using the Session object directly.
-  sessions.push(session)
 })