Delete no_kwargs! macro

vm/src/macros.rs

@@ -1,16 +1,3 @@
-#[macro_export]
-macro_rules! no_kwargs {
-    ( $vm: ident, $args:ident ) => {
-        // Zero-arg case
-        if $args.kwargs.len() != 0 {
-            return Err($vm.new_type_error(format!(
-                "Expected no keyword arguments (got: {})",
-                $args.kwargs.len()
-            )));
-        }
-    };
-}
-
 #[macro_export]
 macro_rules! py_module {
     ( $vm:expr, $module_name:expr, { $($name:expr => $value:expr),* $(,)? }) => {{