chlorine is one of the last things you want to worry about.. It's not something I've ever seen lead to issues.. It's levels are so low that even leaving water sitting out for 24hrs does very, very little to reduce the levels.. The whole chlorine thing got popular a few years back and people ran with it.. Is chlorine good? Yes and No, lol.. Why do people want to remove it? Because it can kill off fungus and microbes (good ones AND bad ones).. That's it's job.. That's what it does in pools and drinking water.. But in soil, doesn't kill them off faster than they can reproduce.. Or faster than you can add them back.. I didn't see a post that said you added a source of microbe life to the soil (recharge, compost tea, ewc, etc).. So having low levels of chlorine in your pot isnt harming much of anything.