I found out why they removed it, it was to accommodate penguins. W. T. F. Why would you remove a video mode just because of that. Like, why would you even need to remove it at all, and not just leave it in there? Anyway, if you are one of those people that ask why people still use WON HL, here's your reason. Valve had removed the optimal video mode that my computer needs to run HL smoothly, and it was for penguins. As if there are that many people using penguins to begin with. You wanna know how many people on steam use penguins? Less than 1%.
Someone on github called this an 'abhorrent move on valve's part' and made the argument that valve was dumb to have removed this mode without optimizing the other video mode for current users. The next time someone says "why are you still using WON" you can eat the fudge right out of my used diapers.