Delete deny(unaligned_references) from test

    warning: lint `unaligned_references` has been removed: converted into hard error, see issue #82523 <rust-lang/rust#82523> for more information
        --> test_suite/tests/test_macros.rs:1931:8
         |
    1931 | #[deny(unaligned_references)]
         |        ^^^^^^^^^^^^^^^^^^^^
         |
         = note: `#[warn(renamed_and_removed_lints)]` on by default

test_suite/tests/test_macros.rs

@@ -1928,7 +1928,6 @@ fn test_internally_tagged_newtype_variant_containing_unit_struct() {
     );
 }
 
-#[deny(unaligned_references)]
 #[test]
 fn test_packed_struct_can_derive_serialize() {
     #[derive(Copy, Clone, Serialize)]