lib/config.js
function (plugin) {
    var ret = false;
    if (config.plugins[plugin] !== undefined) {
      delete config.plugins[plugin];
      configHelpers.saveConfig();
      ret = true;
    }
    return ret;
  }
function (plugin) {
    var ret = false;
    if (config.plugins[plugin] !== undefined) {
      delete config.plugins[plugin];
      configHelpers.saveConfig();
      ret = true;
    }
    return ret;
  }
Remove given plugin from the configuration file.

@param {String} plugin The plugin name as it's typed by the user
(user/repo).