No, I didn't remove the tank when I fitted mine, just undo the two allen bolts at the front by the steering head, the tank then just pivots back, you may need to detach some of the hoses as they get stretched pretty tight when the tank goes right back.
I installed mine myself. Tank does not need to come off. Just remove the two bolts at the front and tilt it back. You’ll need something to keep it elevated while you work under it. And you may want to bend the tabs at the pivot if you have them. My 2018 has them. Stupid.