Yes 'TCS Off' is the default.
It's not as simple as removing a fuse, I wouldn't recommend taking a fuse out, this actually buggers up a few of the other systems that rely on the TCS and will give the SLIP light as well as the car detects an error. You also can't turn it on if you decide you want to, you'd have to mess around replacing a fuse.
The other benefit is the switch still works, just in reverse...you press to turn on. This circuit just reverses the operation of the switch
It took me a while to build these a fair bit of trial and error