Yes. I really don't have a need for the rear brake... I weigh so little that there's nothing keeping the rear wheel planted. I barely use it on my other bike as it is, and I'm very confident with the front brake (years of practicing rolling endos). If its slippery enough for the front to lock into a slide then what possible good can a rear brake do you?

At the end of one of my regular off-road loops as I ride back through my village, there's a downhill section at the bottom of which I turn right. I find it very hard to signal and slow down because the rear brake offers so little slowing. I would far rather have access from either hand to the front brake. This is easy enough to do by running a line from left-hand master cylinder to the bleed bolt on the right-hand master cylinder (or vice-versa), and then as normal from the right hand master cylinder to the first slave cylinder and then to the second slave. This leaves no lever for the irrelevant back brake anyway, plus then there's a significant weight saving.