code: def delete_metadata(address=None, tx_hash=None, block_hash=None, api_key=None, coin_symbol='btc'):
      '''
      Only available for metadata that was embedded privately.
      '''
      assert is_valid_coin_symbol(coin_symbol), coin_symbol
      assert api_key, 'api_key required'
  
      kwarg = get_valid_metadata_identifier(
          coin_symbol=coin_symbol,
          address=address,
          tx_hash=tx_hash,
          block_hash=block_hash,
          )
  
      url = make_url(coin_symbol, meta=True, **kwarg)
  
      params = {'token': api_key}
  
      r = requests.delete(url, params=params, verify=True, timeout=TIMEOUT_IN_SECONDS)
      return get_valid_json(r, allow_204=Truef delete_metadata(address=None, tx_hash=None, block_hash=None, api_key=None, coin_symbol='btc'):
      '''
      Only available for metadata that was embedded privately.
      '''
      assert is_valid_coin_symbol(coin_symbol), coin_symbol
      assert api_key, 'api_key required'
  
      kwarg = get_valid_metadata_identifier(
          coin_symbol=coin_symbol,
          address=address,
          tx_hash=tx_hash,
          block_hash=block_hash,
          )
  
      url = make_url(coin_symbol, meta=True, **kwarg)
  
      params = {'token': api_key}
  
      r = requests.delete(url, params=params, verify=True, timeout=TIMEOUT_IN_SECONDS)
      return get_valid_json(r, allow_204=True)
docs: Only available for metadata that was embedded privately.