docs: def delete_stack(stack):
      """
      Deletes a stack that was previously saved.load_stack
  
      :param caliendo.hooks.CallStack stack: The stack to delete.
      """
      global CACHE_
      key = "{0}.{1}".format(stack.module, stack.caller)
      if key in CACHE_['stacks']:
          del CACHE_['stacks'][key]
          write_out()