docstr: delete_file removes the file with the given ID.
docstr_tok: ["delete_file","removes","the","file","with","the","given","ID","."]
code: def test_delete_file(self):
      """delete_file removes the file with the given ID."""
      file_id1 = self.storage.load_and_get_id(
          b"mock_bytes_1",
          mimetype="video/mp4",
          kind=MediaFileKind.MEDIA,
          filename="file.mp4",
      )
      file_id2 = self.storage.load_and_get_id(
          b"mock_bytes_2",
          mimetype="video/mp4",
          kind=MediaFileKind.MEDIA,
          filename="file.mp4",
      )
  
      # delete file 1. It should not exist, but file2 should.
      self.storage.delete_file(file_id1)
      with self.assertRaises(Exception):
          self.storage.get_file(file_id1)
  
      self.assertIsNotNone(self.storage.get_file(file_id2))
  
      # delete file 2
      self.storage.delete_file(file_id2)
      with self.assertRaises(Exception):
          self.storage.get_file(file_id2)
  
imports: import unittest
  from unittest import mock
  from unittest.mock import MagicMock, mock_open
  from parameterized import parameterized
  from streamlit.runtime.media_file_storage import MediaFileKind, MediaFileStorageError
  from streamlit.runtime.memory_media_file_storage import MemoryFile, MemoryMediaFileStorage, get_extension_for_mimetype
label_desc: Use image node_id 8 for calling the MemoryMediaFileStorageTest obj's underlying member method code with example usage: obj.test_delete_file() without return types