code: def remove(self, document_id, namespace, timestamp):
          
          database, coll = self._db_and_collection(namespace)
  
          meta_collection = self._get_meta_collection(namespace)
  
          doc2 = self.meta_database[meta_collection].find_one_and_delete(
              {self.id_field: document_id}
          )
          if doc2 and doc2.get("gridfs_id"):
              GridFS(self.mongo[database], coll).delete(doc2["gridfs_id"])
          else:
              self.mongo[database][coll].delete_one({"_id": document_id})
docs: Removes document from Mongo
  
          The input is a python dictionary that represents a mongo document.
          The documents has ns and _ts fields.