Considering u said u had a heatwave and the look of ur damage looks that of heat stress. When ur temps got hot the plant under/closest to your grow light got even hotter. Resulting in heat stress. As per removing... it's really just cosmetic damage that wont worsen or spread if ur temps are inline now. But those burnt leaves wont do the plant much of anything on there. It's really your call. If heat and humidity are a problem for u. Open wounds from removing stuff could be a gateway for botrytis mold to strike. Mabey safer to leave it and deal with the plant looking a bit burnt. Happy growing and stay lit fam.