Is It Possible to Shave the Sides of Nasal Bone?

If the edges of your nasal bones are filed down, this may lead to a wider appearance of your nose. So a qualified, experienced Rhinoplasty surgeon would likely need to in-fracture your nasal bones at the time of surgery to correct an appearance that could be too wide.
I hope this helps, and best regards.

There are many ways to do this but it depends on the thicknes of the bones. Sometimes this is due to cartilage and not bone. You should meet with a surgeon to discuss your concerns. Certainly if you desire a conservative correction, express this to the surgon, to review your options

Instead of shaving the bones, the bones are usually broken incompletely to bring them closer together and narrow the width of the nose. Make sure you let your surgeon know that you don't want to narrow of a nose. The entire procedure can be done as an outpatient and is very well tolerated. Good luck!

Yes, the nasal bones can be shaved or rasped on the sides to narrow the width of your bridge. Osteotomies (re-setting or contolled fractiring) are also used to reduce the wideness of the nose, yet result in a natural look.

Shaving the nasal bone generally achieves a subtle improvement only. The nasal bones just aren't that thick. When a significant hump is removed or a significant narrowing of the nose is needed, an osteotomy (insetting of the bones) is generally necessary.
Both techniques are valuable in different circumstances.