I'm guessing you're referring to Bryce, the guy in SketchUp and not Bryce the rendering program?
Delete him from the drawing window, open the Components browser and set the little drop down menu to In model[/in], click on the little black arrow that points out to the right. Click on Purge unused.
Now, if you want to get rid of him permanently, you need to change the template you are using as the starting template. If you mostly draw woodworking sorts of things, e-mail me and I'll send you my template.
If you'd rather set up your own, let me know and I'll get you going.
Dave