Suzuki doesnt have the option to disconnect ABS manually like BMW has... actually I´d appreciate that function just for the reason that if youre getting some trouble with it you could put it off.
Then again, the system is of course not allowed to go totally in "no-brakes" mode, so if theres some malfunction, it should automatically disconnect the ABS, and leave normal brakes on. In theory that is, ive never tested that on my DL.
Taking the ABS fuse off should do the same. Not sure if its a good idea to ride like that for a long time, though.
Then again, ABS is not a new system anymore, manufacturers should by now be aware of its potential faults.. and Suzuki usually know how to build bikes, so I´d be relatively confident that they have tested their ABS, and know theres no need to disconnect it. Never heard of any problems with Suzuki´s ABS.