Allow useless conversion (#4838)

Author: mejrs

pyo3-macros-backend/src/quotes.rs

@@ -17,6 +17,7 @@ pub(crate) fn ok_wrap(obj: TokenStream, ctx: &Ctx) -> TokenStream {
     let pyo3_path = pyo3_path.to_tokens_spanned(*output_span);
     quote_spanned! { *output_span => {
         let obj = #obj;
+        #[allow(clippy::useless_conversion)]
         #pyo3_path::impl_::wrap::converter(&obj).wrap(obj).map_err(::core::convert::Into::<#pyo3_path::PyErr>::into)
     }}
 }