I think they mean minimum wage laws in general. Another comment mentioned that restaurants were reclassifying their workers as contractors to pay them less.
Describing this as restaurants being "forced" to reclassify their drivers is mildly disingenuous. There's some coercion in minimum wage laws, yes, but it does not specifically prescribe a particular solution to balancing your books. The restaurants could alternatively not offer delivery, or charge more for delivery orders. Lord knows companies are very good at passing along costs to consumers these days...