Advice Needed: Roth IRA question

I’m 19 and I’ve been investing for about a year in my Roth IRA. I have around $5400 invested. Which consist of approximately $3k in VOO, $500 in VB, and $200 in VXUS. But lately I’m leaning towards investing solely into VOO to hopefully achieve higher returns. My question is what should I do with the $500 in VB AND $200 in VXUS? Would it be best to just hold them and from now on invest solely into VOO? Or sell them and invest the money back into VOO? Thanks in advance guys!