remove unnecessary generics

diff --git a/compiler/rustc_macros/src/diagnostics/diagnostic.rs b/compiler/rustc_macros/src/diagnostics/diagnostic.rs
index 8ba2fcf6ec2ec6cdf63d3486a451274ceeaf27aa..c24b45862eb034291259b1ffe2cae9a70b016f00 100644 (file)
--- a/compiler/rustc_macros/src/diagnostics/diagnostic.rs
+++ b/compiler/rustc_macros/src/diagnostics/diagnostic.rs
@@ -360,10 +360,10 @@ fn generate_structure_code(
         Ok(tokens.drain(..).collect())
     }
 
-    fn generate_field_attrs_code<'a>(
-        &'a mut self,
-        attrs: &'a [syn::Attribute],
-        info: FieldInfo<'a>,
+    fn generate_field_attrs_code(
+        &mut self,
+        attrs: &[syn::Attribute],
+        info: FieldInfo<'_>,
     ) -> TokenStream {
         let field_binding = &info.binding.binding;