It's easy to remove the torsion bar.
Unfortunately, the torsion bar also functions to retain the blade in the closed position. Without it, the blade could accidentally open in your pocket. There are a couple of fixes. You could simply crank down the pivot and use friction to keep the blade where it belongs. This would affect opening smoothness, however. The other option is to drill a detent hole in the blade that the detent ball on the lock can fit into. This is how standard manual liner locks work. The problem with this is drilling a precise hole in hardened steel. The best way to do this is to use a straight-flute, solid carbide drill bit in a solid drill press. These bits are expensive and fragile, and you don't want to screw up the hole.
I forgot to add. The flipper opener was designed for use with a spring, so it will not flip well no matter what you do.