Update lendingbot.py
Update lendingbot.py

Don't "require" an arg that has toggleable functionality.
BitBotFactory/poloniexlendingbot,mahiso/poloniexlendingbot,Mikadily/poloniexlendingbot,yura-pakhuchiy/poloniexlendingbot,Mikadily/poloniexlendingbot,yura-pakhuchiy/poloniexlendingbot,yura-pakhuchiy/poloniexlendingbot,laxdog/poloniexlendingbot,BitBotFactory/poloniexlendingbot,laxdog/poloniexlendingbot,Mikadily/poloniexlendingbot,laxdog/poloniexlendingbot,mahiso/poloniexlendingbot,mahiso/poloniexlendingbot,BitBotFactory/poloniexlendingbot,BitBotFactory/poloniexlendingbot,mahiso/poloniexlendingbot