you could try heating the area and hope the glue softens enough to pull the hinges out.

But you risk warping or burning the structure or loosening other glue joints.

If you cut the hinges, then you may be able to cut them out if you go slow and be careful.

In any case, they do need to be redone. You should be able to get a control surface on with only about 1/32" gap or so.