No.
The physics of a spring dictates that with all other things being equal, the more turns, the lighter the spring. And this is also why cutting coils off of the spring will not really reduce the trigger pull, in fact it will stiffen the trigger pull, unless you cut it so short that there is no preload on the spring (in other words, the striker is not partially cocked by cycling the slide).
To make a lighter spring would require a spring with either more coils of wire, thinner wire, or wire made of a different material or alloy. In any event, a lighter spring requires a replacement spring. There is no way to modify the factory spring to make it weaker unless you work harden it or deform it mechanically or do something else to it to degrade the material the spring is made from.
Now getting away from the discussion about this striker spring in particular, but talking about springs in general, some people may find that shortening a spring by cutting coils can appear to reduce the effort required to begin to compress the spring, but this is only the case if the spring is under preload and after it is cut it is no longer preloaded.
So for example, let's say that I have a spring that is 10 lbf/in rate that is 1.0" in free length, but it is .75" in the installed length. So it is under 2.5 lb of pre-load. It will require 2.5 lb of force to just begin to compress the spring. So to compress it another .25" will require 5.0 lb of force total (2.5 preload plus 2.5 lb for the additional .25"). Now, if I cut 25% of the coils off of the spring so that now it is only .75" long, it will now be 13.3 lb/in (33% stiffer) but under no preload when installed. So to compress it .25" will require only 3.3 or so lb of force.
Now, with a Kahr striker spring, you would have to cut it down to the point at which it was not under a significant preload while the pistol was in the partially-cocked "ready" state in order to reduce the trigger pull. Maybe there is a sweet spot where you could cut the spring and result in a lighter trigger without compromising the function of the striker. The Kahr striker spring is under heavy pre-load when the pistol is partially-cocked. The more reliable way to reduce the trigger pull is as Jocko suggested, put a lighter striker spring in there and then hope for the best with respect to primer ignition. Jocko has good results. I am not so confident of lighter striker springs being a good idea universally.
Incidentally any of you S&W Sigma owners out there, the striker spring is the real way to lower the trigger weight. You can probably more safely reduce the striker spring in a Sigma than you can in a Kahr because the Sigma seems to have much more striker protrusion than a Kahr (at least .010" more) so it's not on the edge of not working to begin with.