code: def test_delete_atom(self, container: MetadataContainer):
      key = self.gen_key()
      value = fake.name()
  
      container[key] = value
      container.sync()
  
      assert container[key].fetch() == value
  
      del container[key]
      with pytest.raises(AttributeError):
          container[key].fetch()
  
imports: import random
  from datetime import datetime, timezone
  import pytest
  from neptune.metadata_containers import MetadataContainer
  from tests.e2e.base import AVAILABLE_CONTAINERS, BaseE2ETest, fake
label_desc: Use image node_id 4 for calling the TestAtoms obj's underlying member method code with example usage: obj.test_delete_atom(container) without return types