bugfix: Fix issues with warnings, not related to this PR

Author: tgodzik

tests/warn/i24034/circe.scala

@@ -50,10 +50,10 @@ object ConfiguredCodec:
   ): Expr[ConfiguredCodec[A]] = {
     mirror match {
       case '{
-            ${ _ }: Mirror.ProductOf[A] {
-              type MirroredLabel = l
-              type MirroredElemLabels = el
-              type MirroredElemTypes = et
+            ${ _ }: Mirror.ProductOf[A] { // warn
+              type MirroredLabel = l // warn
+              type MirroredElemLabels = el // warn
+              type MirroredElemTypes = et // warn
             }
           } =>
         '{