First off, it would help to read the liink.............
2 Pizza Hut franchises which happen to own a few stores are the only ones doing this in the article. Not all pizza places as the OP asserted in their title.
They are doing the layoffs up through Feb because of the 20 dollar minimum wage law that takes effect in April, and the franchise owners don't want to pay the money. Chances are, they will probably try to use GrubHub or some other delivery service, but will find out it doesn't work as well as they thought, and will hire back drivers (my prediction).
And,,,,,,,,,,,its only the 2 Pizza Hut franchises doing this...........not all pizza places.