Improve pub sub mode further

lib/command.js

@@ -4,10 +4,9 @@
 // a named constructor helps it show up meaningfully in the V8 CPU profiler and in heap snapshots.
 function Command (command, args, buffer_args, callback) {
     this.command = command;
-    this.args = args; // We only need the args for the offline commands => move them into another class. We need the number of args though for pub sub
+    this.args = args;
     this.buffer_args = buffer_args;
     this.callback = callback;
-    this.sub_commands_left = args.length;
 }
 
 function OfflineCommand (command, args, callback, call_on_write) {