gfe-relnote: Deprecate gfe2_reloadable_flag_quic_simplify_stop_waiting.

PiperOrigin-RevId: 257008406
Change-Id: I8f7328c8b7c5249970a47f5004ad0610e4630931
diff --git a/quic/core/quic_connection.cc b/quic/core/quic_connection.cc
index f86466e..ec3e9df 100644
--- a/quic/core/quic_connection.cc
+++ b/quic/core/quic_connection.cc
@@ -979,12 +979,8 @@
   // If the incoming ack's packets set expresses received packets: peer is still
   // acking packets which we never care about.
   // Send an ack to raise the high water mark.
-  bool send_stop_waiting = GetLeastUnacked() > start;
-  if (GetQuicReloadableFlag(quic_simplify_stop_waiting) &&
-      no_stop_waiting_frames_) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_simplify_stop_waiting);
-    send_stop_waiting = false;
-  }
+  const bool send_stop_waiting =
+      no_stop_waiting_frames_ ? false : GetLeastUnacked() > start;
   PostProcessAfterAckFrame(send_stop_waiting,
                            ack_result == PACKETS_NEWLY_ACKED);
   processing_ack_frame_ = false;