How would I remove these wheels?

I need to take the wheels off the bottom of this dresser. I'm going to be setting up a terrarium on it and I'm worried the wheels won't hold up the weight. Short of grinding the metal... dowels? (for lack of a better word) off, is there a way of usually disassembling something like this? the only way I could see is unscrewing that screw right above the wheel, but they all look stripped, and anyway I can't see how that would mean I could take the whole assembly out of the dresser leg even if I was able to get the screws out.

https://preview.redd.it/oe62puy78x6e1.jpg?width=1536&format=pjpg&auto=webp&s=077438520776c4a266b657c2a5b6d10bc379fef2

https://preview.redd.it/2aokkap88x6e1.jpg?width=1536&format=pjpg&auto=webp&s=3dc018ae6f703ecdc878418b619f9cd1d30f7802

https://preview.redd.it/63xsxi598x6e1.jpg?width=1536&format=pjpg&auto=webp&s=0460075f894aeaa53f9d4947db136628e30d1e92