doc: remove unnecessary comment

src/root.zig

@@ -21,7 +21,6 @@ fn logFn(
     if (comptime build_options.file.len > 0) {
         // TODO handle errors accordingly (i.e. panic?)
         // NOTE with zig 0.13.0 there is currently no way to open files to append (except to use libc or talk directly to posix, which this lib should not have to do)
-        // file, err := os.OpenFile("log", os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
         const fd = std.posix.open(build_options.file, .{
             .CREAT = true,
             .APPEND = true,