Omitting Coul interactions in a system with zero charged atoms?

Dear LAMMPS Users and Developers

I’m working on a system in which all atoms are of zero charges.

So, I think of omitting the coul interaction in my case.

Is it correct? If no, why?

You are correct. You do not need or want to use a coul style, which explicitly includes charge. In fact, you don’t even need the charged atom styles LAMMPS needs for Coulombic calculations. This will slightly improve performance.