The gap between the calipers and the wheel is very close on those bikes. The hydraulic line which connects the two is extremely tight. The solution is actually quite simple; remove the front fender. Its only four bolts, take them out, pop the hydraulic line out from its holder and gently slide the fender forward. This will release the stress on the hydraulic line and give you the extra space to remove the calipers.
DO NOT unscrew the banjo fitting, as it will drip break fluid everywhere and contaminate the brake pads and rotor. Plus, the system will need to be re-bled when re-assembled.
With the fender removed, if you have a stand which doesn't interface with the forks or wheel, you can leave the calipers on the bike by simply popping the axel out and twisting the fork legs out as you remove the wheel. This is a great trick for those who wish to save time.