Chili pepper plant in second year. Do I trim to one centralized stem?

Based in SoCal. This play had steadily produced since last summer. I neglected it for a few weeks and now there are some aphids I’m in the process of cleaning up. But as I’m cleaning, I’m wondering if I should cut some of the plant, to make it one centralized stem (the woody looking one) to help with growth this year. Thoughts?

Thanks!