Will deleting someone's text log free up space on my IPhone 4?

I'm getting divorced and have had my IPhone4S for lil over a year and a half. I've got texts from my ex wife along with pics and things she has sent… Is this worth freeing up or is it not gonna amount to much anyhow?

They are just text logs. It won't free up much. Its not worth freeing up expecting for a great size.