gfe-relnote: Deprecate gfe2_restart_flag_quic_enable_accept_random_ipn.

PiperOrigin-RevId: 253603387
Change-Id: I462d960d7cccaab09c908e0fefb151367ca58007
diff --git a/quic/core/quic_received_packet_manager.h b/quic/core/quic_received_packet_manager.h
index 7c9bd7f..8abe5f9 100644
--- a/quic/core/quic_received_packet_manager.h
+++ b/quic/core/quic_received_packet_manager.h
@@ -85,11 +85,10 @@
 
   QuicPacketNumber GetLargestObserved() const;
 
-  // Returns peer first sending packet number to our best knowledge. If
-  // GetQuicRestartFlag(quic_enable_accept_random_ipn) is false, returns 1.
-  // Otherwise considers least_received_packet_number_ as peer first sending
-  // packet number. Please note, this function should only be called when at
-  // least one packet has been received.
+  // Returns peer first sending packet number to our best knowledge. Considers
+  // least_received_packet_number_ as peer first sending packet number. Please
+  // note, this function should only be called when at least one packet has been
+  // received.
   QuicPacketNumber PeerFirstSendingPacketNumber() const;
 
   void set_connection_stats(QuicConnectionStats* stats) { stats_ = stats; }