Do we need the luajit fork?

[ianks]

I've run into some issues with updating due it having it, and the current homebrew version supports arm64. Do we still need our patches?

cc: @lugray

[lugray]

I don't know why we initially needed it, so I don't know if we still need it. My most recent commit was just to get our fork - which existed long before arm macs - working on arm. Arm was definitely not the motivator of our having a fork.