message: Remove #trace(unsafe_ignore) on enum variants
  Summary:
  Only allow on enum variant struct fields.
  Left accidentally in (https://github.com/facebookexperimental/starlark-rust/commit/4d62bdf45220cdf27cec785c001cfc80bb59df5f).
diff: @@ -124,9 +124,6 @@ fn trace_enum(data: &DataEnum) -> TokenStream {
  if let Fields::Unit = variant.fields {
  continue;
  }
  - if is_ignore(&variant.attrs) {
  - continue;
  - }
  match &variant.fields {
  Fields::Named(fields) => {
  for field in &fields.named {
  