You are right I did not explain what I wanted to do so it was not clear what was the best procedure. Thanks for the good suggestion. Fortunately, I had another refrigerator with an almost empty freezer where I placed all the frozen food while the freezer unit, now set on zero, was able to warm up slowly. After about five hours I found things had softened enough that I was able to remove the shelves which each had about 1/2 inch of ice on them. Other ice was also easy to remove at that time and we dried it out and left it for about another 8 hours when I turned the freezer back on and after about two hours I put the frozen food back in. So your idea that it might warm up if I turned the freezer off was correct and I was able to accomplish what I wanted. I don't see any evidence of a leak. The water and ice was a one time occurrence that happened one day and that is why I suspect that the freezer door had been left over for an extended period maybe on a day when we were away from early morning to late evening. I will keep watch to see if any other water or ice shows up. I do have the ice maker turned off right now (I have plenty of ice) and the problem may reoccur when I turn the ice maker back on so I will watch.
Thanks for your clear advice and I am sorry I did not clearly explain what I was trying to accomplish.