docs: function deleteTags(cb) {
    async.series([
      async.apply(git.fetch, {tags: true, remote: remote}),
      function(cb) {
        async.waterfall([
          async.apply(git.getTags),
          function(tags, cb) {
            git.removeTags({tags: tags, remote: remote}, cb);
          }
        ], cb);
      }
    ], cb);
  }