Can I Erase Spells from my Spell Book

[FarAway Sooner]

I tried searching for an answer to this question but couldn't find any.

Early on in my play as a Mage, I learned a bunch of spells that I'm not ever using, and now my Spell book is full. I know I can expand my Spell book a little through skill picks, but is there any way to erase spells that I'm never going to use? I'm worried that my Spell book is choked with Level 1 spells and all I ever do in the early levels is cast Fireball, Poison Skull, and the occasional Trap spell.