Ideas to save hardwood floor from botched tung oil job?
In a closet or other inconspicuous area try applying pure undiluted orange oil in a thin layer. This will soften and extract the tung oil, then scrape the softened layer with a 4" or 8" wide razor scraper, periodically scraping off the scraper with a putty knife.

Then go over the floor with orange oil on a rag, then mineral spirits to remove the residue of orange oil. I haven't used this myself on hardwood, but have used it to remove adhesive from concrete.

I realize this may be just too expensive and perhaps sanding is the no nonense  professional procedure, but sticky tung oil would probably gum up the sanding belts. And I just hate handling dust.

Edit
If all you want to do is remove excess tung oil, maybe you could use an electric floor buffer with pads. Apply a thin layer of orange oil, let sit for 5 minutes or so then run the floor buffer with an absorbent pad over the oiled area. I would not use an electric buffer with highly volatile solvent like mineral spirits because of risk of fire or even explosion.