remove unnecessary lazy evaluations

crates/hir-def/src/macro_expansion_tests.rs

@@ -170,7 +170,7 @@ pub fn identity_when_valid(_attr: TokenStream, item: TokenStream) -> TokenStream
             }
             let pp = pretty_print_macro_expansion(
                 parse.syntax_node(),
-                show_token_ids.then(|| &*token_map),
+                show_token_ids.then_some(&*token_map),
             );
             let indent = IndentLevel::from_node(call.syntax());
             let pp = reindent(indent, pp);