Dropping ONE leg of the trigger return spring off the frame post is called a "poor boy trigger job", and while I do not recommend it, I have done it on all my new model Ruger SA's for over 30 years with ZERO problems.
You might have different results, and because of that, I do not recommend it, but my personal experience over decades is that it does lighten the pull weight and does not impair the functional reliability of the gun in any way.
The good thing about it is that if it doesn't do what you want, it is quickly and simply reversible, just by putting the spring leg back on the stud.