Yep. Get rid of the rest of the yellowing leaves. They not doing there job no more. Your clones will be fine. Its the easy part now. Just wait for roots.
Cloning is not hard as people make it out to be. I don't do none of that crap alot if folks do. No heating pad no dome no misting no cloning gel. U don't have to pick the healthiest branch of the best plant.
I've cloned parts from topping. Cloned from plants in late bloom (monster cropping). Made 5 clones from one branch. Took cutting strait to water and soil.
U just cut it put it in soil and keep it moist not saturated and there u go easy peezy.
I rather keep small clones instead of mothers. Easier to keep a few at a time.