Given an file_id, delete this stored file's files collection document
        and associated chunks from a GridFS bucket.

        For example::

          my_db = MongoClient().test
          fs = GridFSBucket(my_db)
          # Get _id of file to delete
          file_id = fs.upload_from_stream("test_file", "data I want to store!")
          fs.delete(file_id)

        Raises :exc:`~gridfs.errors.NoFile` if no file with file_id exists.

        :Parameters:
          - `file_id`: The _id of the file to be deleted.

def delete(self, file_id):
        """Given an file_id, delete this stored file's files collection document
        and associated chunks from a GridFS bucket.

        For example::

          my_db = MongoClient().test
          fs = GridFSBucket(my_db)
          # Get _id of file to delete
          file_id = fs.upload_from_stream("test_file", "data I want to store!")
          fs.delete(file_id)

        Raises :exc:`~gridfs.errors.NoFile` if no file with file_id exists.

        :Parameters:
          - `file_id`: The _id of the file to be deleted.
        """
        res = self._files.delete_one({"_id": file_id})
        self._chunks.delete_many({"files_id": file_id})
        if not res.deleted_count:
            raise NoFile(
                "no file could be deleted because none matched %s" % file_id)