This is spot on advice! In fact, you should take this further. From now on don't do the following:
These things will cause you to gain weight, thus making chins harder. In fact, I would also suggest the following:
-Run 20 miles a day
-Take a prescription laxative
-Chop off a leg
This should help reduce your bodyweight to a level low enough to do 10 chins.
Seriously, who the hell wants to stop working out their legs? I believe he's wanting advice on how to get stronger at chins. He didn't say anything about being unbalanced, just that he's gained leg mass from introducing squatting (which means he has probably corrected a previous imbalance).
I've gotten great results from doing just one, super strict super clean chin-up in between every exercise that I do every day that I hit the gym. This helps your CNS get more efficient at performing the chins. Then, on whatever day that you do chins, do a few good sets of five (if you're current max is 6-7) with some rest.
I've also seen good results just trying to get fifty chins one day a week, no matter how many sets it takes.
Of course, what do I know? I'm only 225lbs, squatting 565 lbs and doing 15 straight chins. I should probably stop squatting and I could surely get that number up to 20.