gfe-relnote: Deprecate gfe2_reloadable_flag_quic_use_ack_frame_to_get_min_size.

PiperOrigin-RevId: 307642479
Change-Id: I6d16adfd2f79e1096bd52a022c02e97f6f23abea
diff --git a/quic/core/quic_framer.h b/quic/core/quic_framer.h
index f0c694a..8ace715 100644
--- a/quic/core/quic_framer.h
+++ b/quic/core/quic_framer.h
@@ -312,13 +312,9 @@
                                     QuicByteCount length);
   // Size in bytes of all ack frame fields without the missing packets or ack
   // blocks.
-  // TODO(fayang): Remove |largest_observed_length| when deprecating
-  // quic_use_ack_frame_to_get_min_size.
-  static size_t GetMinAckFrameSize(
-      QuicTransportVersion version,
-      const QuicAckFrame& ack_frame,
-      uint32_t local_ack_delay_exponent,
-      QuicPacketNumberLength largest_observed_length);
+  static size_t GetMinAckFrameSize(QuicTransportVersion version,
+                                   const QuicAckFrame& ack_frame,
+                                   uint32_t local_ack_delay_exponent);
   // Size in bytes of a stop waiting frame.
   static size_t GetStopWaitingFrameSize(
       QuicPacketNumberLength packet_number_length);