Internal cleanup

PiperOrigin-RevId: 973652924
Change-Id: Ifa250d018c8f95bd08552ff8885ed1db83c18082

absl/strings/internal/cord_rep_flat.h

diff --git a/absl/strings/internal/cord_rep_flat.h b/absl/strings/internal/cord_rep_flat.h
index 34da171..9a2604b 100644
--- a/absl/strings/internal/cord_rep_flat.h
+++ b/absl/strings/internal/cord_rep_flat.h
@@ -111,7 +111,7 @@
 
   // Creates a new flat node.
   template <size_t max_flat_size, typename... Args>
-  static CordRepFlat* NewImpl(size_t len, Args... args ABSL_ATTRIBUTE_UNUSED) {
+  static CordRepFlat* NewImpl(size_t len, Args... args [[maybe_unused]]) {
     if (len <= kMinFlatLength) {
       len = kMinFlatLength;
     } else if (len > max_flat_size - kFlatOverhead) {