code: function (plugin) {
      var ret = false;
      if (config.plugins[plugin] !== undefined) {
        delete config.plugins[plugin];
        configHelpers.saveConfig();
        ret = true;
      }
      return ret;
    }
docs: Remove given plugin from the configuration file.
  
  @param {String} plugin The plugin name as it's typed by the user
  (user/repo).