It's nothing you necessarily need to do so long as your vehicle is in good working shape.
People on describe issues with the OEM security system and the starter relay failing over time and causing issues with starting. Additionally, the clutch safety switch is another potential point of failure - I personally witnessed this after fragging the rubber stopper on mine and couldn't start the car normally until replacing it.
Removing/bypassing these circuits isn't necessary - I am just a minimalist and have made the decision to remove the circuits to reduce complexity and increase reliability.