[whpalmer4]

Not quite a one-click solution, but not difficult:

Go to the resource availability view (the calendar icon). Select the resource in question, and the Work Schedule for the resource (as opposed to the Normal Work Week for the resource). As you flip through the months of the calendar, you'll see the days where the resource's work schedule differs from the work schedule for the project highlighted. If you click on those days, you'll see the work schedule for that week at the right, and just above the date labels on that display will be a little annotation about "Customized from Resource <xyz>'s normal work week" and a circle with an x in it. If you click that circle/x, that week's customization is removed. You can flip through the months very rapidly, and the green squiggly lines next to the resource name in the resource view will disappear when you've gotten them all.