docs: def _remove_broken_links():
      '''
      Remove broken links in `<conda prefix>/etc/microdrop/plugins/enabled/`.
  
      Returns
      -------
      list
          List of links removed (if any).
      '''
      enabled_dir = MICRODROP_CONDA_PLUGINS.joinpath('enabled')
      if not enabled_dir.isdir():
          return []
  
      broken_links = []
      for dir_i in enabled_dir.walkdirs(errors='ignore'):
          if platform.system() == 'Windows':
              if dir_i.isjunction() and not dir_i.readlink().isdir():
                  # Junction/link target no longer exists.
                  broken_links.append(dir_i)
          else:
              raise NotImplementedError('Unsupported platform')
  
      removed_links = []
      for link_i in broken_links:
          try:
              link_i.unlink()
          except:
              pass
          else:
              removed_links.append(link_i)
      return removed_links