Close store cards for AAoA

I don't think this is how it works but I went on a mini store card spree 3 months ago...my AAOA is right at 2 years because of this. Would I benefit at all by shutting down my buckle, vs, carecredit cards?

I got removed as an AU on wife's kohl's card lastweek.

Leaving me at 5750 total CL. If I dropped the store cards I'd be about 4700 with around 8% utilization.

Thoughts?