Most of the things that weigh more on a touring bike are there for extra reliability, although there are some things that cost less.

Rims: A god rim won't dent or break with a hard knock (tree limb, pothole, etc.) You can probably get a lighter rim; do you want to?

Saddle: Not clear what saddle you're riding from the picture, but you can save a pound on a plastic saddle over a Brooks leather saddle. OTOH, there's a reason 1/2 - 2/3 touring cyclists ride Brooks IME, and it's butt comfort. How much do you want to lighten the load?

Seatpost: Unless you've got an expensive seatpost, you can probably buy a lighter one. It might resist bending or breaking as well as the cheaper model, or at least well enough to get you through your tour safely.

Derailers: A good place to save a few ounces, but it's going to cost you! Cassette: ditto.

Overall, my bikes come in right around 32 pounds. When I lose a third of my body weight, then I'll think about getting a bike that weighs 1/3 less, too.