This is in the kitchen? If it's in the bathroom, you might get a better idea on that forum.

Cutting or grinding the porcelain would be risky. Cutting the wood around it probably would look terrible. I don't know about the bracket. or how it's attached to the wall, but it's probably moveable. What kind of wall surface is behind it, drywall? Moving it is likely the best bet, it's the right way to do it, and it would look best. As far as cost goes, idk. Plumbers get a pretty high hourly rate. Maybe a handyman could do it for less. We have a great guy who can do plumbing and charges $40 an hour. It shouldn't take more than a few hours, but you never know what you'll find when you start opening walls. (And, I'm a notorious time underestimater.)

I thought I clicked on the Plumbing forum, crazy computer. Anyway, thank you for the advice. In the meantime, I called the wood floor installer and he said the floor is only 5/16" thick and a lot of the sinks he has seen still fit on the brackets. They just don't slide all the way down, and they will still be attached to the wall. The pedestal would hold the weight. It sounds reasonable so I hope we won't have to tear up the wall to move the bracket. Wish me luck with the bracket having 5/16 to spare!