Remove unused math module logic

src/math.zig

@@ -1,6 +0,0 @@
-///
-/// Rounds the `Number` `value` up to the nearest `multiple`.
-///
-pub fn roundUp(comptime Number: type, value: Number, multiple: Number) Number {
-    return value + @mod(@mod(multiple - value, multiple), multiple);
-}

src/sys.zig

@@ -3,7 +3,6 @@ const ext = @cImport({
 });
 
 const io = @import("./io.zig");
-const math = @import("./math.zig");
 const mem = @import("./mem.zig");
 const meta = @import("./meta.zig");
 const oar = @import("./oar.zig");