docstr: deleting a file that doesn't exist doesn't raise an error.
docstr_tok: ["deleting","a","file","that","does","n't","exist","does","n't","raise","an","error","."]
code: def test_delete_invalid_file_is_a_noop(self):
      """deleting a file that doesn't exist doesn't raise an error."""
      self.storage.delete_file("mock_file_id")
  
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 9 for calling the MemoryMediaFileStorageTest obj's underlying member method code with example usage: obj.test_delete_invalid_file_is_a_noop() without return types