On a somewhat related note... I removed them as well as both front and rear rebars on my AE86...
OEM stylez though, fo realz.
(Japan didn't have side impact beams or rebars on the AE86... I happened upon a set of rust free AE86 doors that I couldn't resist. Also, the Japanese AE86's do have "bumpers" inside the bumper covers, they just aren't a full rebar like we had, not even close, lol.)
In any case, the weight savings isn't worth the safety loss IMO. Stick with the impact beams. I know I'd rather have them -- even in the AE86.