My problem has been solved thanks to Rogold's suggestion. Bear with me for the following explanation.
The photo in the previous post showed the brake reservoir after I pumped the brakes 25 times with the key on and engine running. That photo shows the fluid level right on the full mark. Following Ronnie's comments, I again pumped the brakes 25 times with the key off. The fluid level rose to the top of the reservoir. I did the pumping method 2 or 3 times since the recent repair, and each time I evacuated an excess amount of brake fluid from the reservoir. (I told the mechanic not to overfill and to use the pumping method - he says he followed my instructions.) However, I suctioned the excess fluid from the reservoir. The current level is as is seen in the photo below - probably in inch or so below the full mark. In the photo is also the the bottle used to contain the excess fluid - a combined 7 1/2 ounces. I suctioned 2-3 ounces of excess fluid each time I used the pumping method down to the full mark so as not to be overfilled.
The other photo is looking straight down into the fluid reservoir. The circular object surrounded by a black ring apparently is the float mentioned by Rogold. I used a flashlight and a drinking straw to probe the float in an up and down motion. The probing dislodged the shiny object propped up in front of the bottle with the excess fluid contained therein. It looks like a piece of aluminum foil that covers the opening of a new can of brake fluid. Removing the aluminum foil, and starting the engine, the ABS yellow and the Red Warning light both disappeared! Problem solved! Thanks to all for your help!