message: Remove outdated FIXME
diff: @@ -968,8 +968,6 @@ fn swap(bcx: &mut FunctionBuilder<'_>, v: Value) -> Value {
  let old = CValue::by_val(old, layout);
  ret.write_cvalue(fx, old);
  };
  -
  - // FIXME https://github.com/bytecodealliance/wasmtime/issues/2647
  _ if intrinsic.as_str().starts_with("atomic_nand"), (v ptr, c src) {
  let layout = src.layout();
  validate_atomic_type!(fx, intrinsic, span, layout.ty);
  