def remove(photo)
      response = connection.delete("/collections/#{id}/remove", photo_id: photo.id)
      (200..299).include?(response.status)
    end
def remove(photo)
      response = connection.delete("/collections/#{id}/remove", photo_id: photo.id)
      (200..299).include?(response.status)
    end
Remove a photo from the collection. If the photo is not in the collection,
 this action has no effect.
 @param [Unsplash::Photo] The photo to remove.
 @return [Boolean] +true+ on success.