code: func (gfs *GridFS) Remove(name string) (err error) {
  	iter := gfs.Files.Find(bson.M{"filename": name}).Select(bson.M{"_id": 1}).Iter()
  	var doc gfsDocId
  	for iter.Next(&doc) {
  		if e := gfs.RemoveId(doc.Id); e != nil {
  			err = e
  		}
  	}
  	if err == nil {
  		err = iter.Close()
  	}
  	return err
  }
docs: // Remove deletes all files with the provided name from the GridFS.