code: def __delitem__(self, index):
      value = self[index]  # Get value before removing
      super().__delitem__(index)
      if self.tracker:
          self.tracker.untrack(value)
  
imports: from functools import wraps
  from keras.backend.common.global_state import get_global_attribute
  from keras.backend.common.global_state import set_global_attribute
  from keras.utils import python_utils
label_desc: Use image node_id 8 for calling the TrackedList obj's underlying member method code with example usage: obj.__delitem__(index) without return types