Fix clippy.

src/intermediate/footnote_definition.rs

@@ -32,6 +32,7 @@ pub(crate) struct IRealFootnoteDefinition {
 }
 
 impl IRealFootnoteDefinition {
+    #[allow(clippy::needless_lifetimes)]
     pub(crate) async fn new<'orig, 'parse>(
         _intermediate_context: IntermediateContext<'orig, 'parse>,
         footnote_id: usize,