Clean up formatting and remove redundant debug output in main.zig

src/main.zig

@@ -7,8 +7,6 @@ pub fn main(init: std.process.Init) !void
 {
     const io = init.io;
 
-    std.debug.print("{any}\n", .{builtin.mode});
-
     if (builtin.mode == .Debug)
     {
         var arena: std.heap.DebugAllocator(.{}) = .init;