code: async def remove_key(request: web.Request) -> web.Response:
      
      keys_dir = CONFIG['wifi_keys_dir']
      available_keys = os.listdir(keys_dir)
      requested_hash = request.match_info['key_uuid']
      if requested_hash not in available_keys:
          return web.json_response(
              {'message': 'No such key file {}'
               .format(requested_hash)},
              status=404)
      key_path = os.path.join(keys_dir, requested_hash)
      name = os.listdir(key_path)[0]
      shutil.rmtree(key_path)
      return web.json_response(
          {'message': 'Key file {} deleted'.format(name)},
          status=200)
docs: Remove a key.
  
      ```
      DELETE /wifi/keys/:id
  
      -> 200 OK
      {message: 'Removed key keyfile.pem'}
      ```