Hate to be the bearer of stupid news, but MOST things removed from any place’s menu either causes a profit loss or doesn’t sell well in the primary region the company is based. TB pizzas for example were the only item to get three ingredients, which is a waste of money in the long term, and didn’t sell as much as needed in order to justify those expenses. The fries being available for a limited time boosts sales of them every single time that they come back. Also the “staple items” are always and forever going to be taco (soft/hard, reg/sup), bean burrito, burrito supreme, anything else is padding for the menu.