remove double init of variable

Author: brianc

lib/client.js

@@ -17,7 +17,6 @@ var Client = function(config) {
   this.database = config.database || defaults.database;
   this.port = config.port || defaults.port;
   this.host = config.host || defaults.host;
-  this.queryQueue = [];
   this.connection = config.connection || new Connection({stream: config.stream});
   this.queryQueue = [];
   this.password = config.password || defaults.password;