Should I cut off the affected leaves ?

They will fight each other because they are in the same container.. every time I try to balance out two plants in the same container it's literally impossible. good luck on that end. One always looks much better then the other.. I'd leave the foliage.. But I like to leave the leaves alone.. Air movement and ventilation are really some of the most effective ways to mitigate pests.Seen a lot of issues with mold, pests and fungus but 95% of the time.. The growers that get pests/molds almost always do not have adequate air ventilation or movement.

Yep, im with ORGANO, those upper leaves still have photosynthetic potential, but the lower ones are just a waste of energy at this point. Later on when the vegetation has further developed you may end up removing these left over leaves, but maybe the plant will use them herself to balance possible nutrient imbalances given that the plant can suck nutrients from the already formed leaves. Stay lit growmie.