code: function removeUpdate(id) {
          var installationResult = _idsToUpdate[id];
          if (!installationResult) {
              return;
          }
          if (installationResult.localPath && !installationResult.keepFile) {
              FileSystem.getFileForPath(installationResult.localPath).unlink();
          }
          delete _idsToUpdate[id];
          exports.trigger("statusChange", id);
      }
docs: Removes the mark for an extension to be updated on restart. Also deletes the
  downloaded package file.
  @param {string} id The id of the extension for which the update is being removed