The bike has Alex G2000 rims. Those weigh 590g. A Velocity Aerohead weighs 425g, a Mavic Open Pro 435g. Replacing the wheels would cost $250ish for decent handbuilt wheels, and probably feel nice. However, it would make a weight difference of a bit under a pound. That's not terribly worthwhile to me.
If you don't mind chainring tattoos, you might buy different chainring bolts and take off the chain guards. If you don't mind getting your bike messy, making your rainy rides suck, and getting whatever fluids are on the road sprayed on you, take off the fenders. Maybe replace the handlebars & stem, especially if you can find something nice used and especially if you'd like to tweak the fit.
But overall, I'd say the Redline 925 is designed more for utility, durability, and cost than weight. Making it a light bike would be difficult and probably mean losing some of its advantages in the utility, durability, or cost categories.