Yes.
I'm sure you won't have to worry about the blade temperature because grinding the ramp off won't get the edge to over 400F. The worst you'll do is toughen the spine a bit. Which doesn't sound terrible at all. You might want to not get the whole ramp glowing, but honestly... the rest of the blade will suck the heat out and distribute it a bit. It will get too hot to hold WAY before you have to worry about over-tempering the edge.
ETA: It would be another story if you were grinding near the tip or the edge.
ETA2: Actually, since the mass of the spine is so great, if you get the ramp glowing as you grind it, by the time you get that area of the spine flat, you MAY have actually hardened a very thin layer, while tempering what's under it. The underlying steel can suck the heat out fast enough to re-harden a very small area. But also, it would only be the part that was visibly glowing when you turned off the grinder for the last time.