docs: def drop_paired_notebook(self, path):
          """Remove the current notebook from the list of paired notebooks"""
          if path not in self.paired_notebooks:
              return
  
          fmt, formats = self.paired_notebooks.pop(path)
          prev_paired_paths = paired_paths(path, fmt, formats)
          for alt_path, _ in prev_paired_paths:
              if alt_path in self.paired_notebooks:
                  self.drop_paired_notebook(alt_path)