code: public boolean removeCandlestickCallback(final BitfinexCandlestickSymbol symbol,
  			final BiConsumer<BitfinexCandlestickSymbol, BitfinexCandle> callback) throws BitfinexClientException {
  
  		return candleCallbacks.removeCallback(symbol, callback);
  	}
docs: Remove the a candlestick callback
  @param symbol
  @param callback
  @return
  @throws BitfinexClientException