request: revert #60

[nektro]

enabling --ast-check causes zig fmt to not work in many cases during development since unused variables is now a check under AstGen.

not having the code properly formatted can making solving these errors much harder than they over wise would be

60

[haze]

I disagree with this sentiment: I often use the sign that if my code doesn't auto format that there is an error somewhere, so I appreciate unused variables causing that