gfe-relnote: Deprecate gfe2_reloadable_flag_quic_fix_get_packet_header_size

PiperOrigin-RevId: 268463387
Change-Id: I5ba9d04c9b4a6b439c85e17e199d8ff76ec7ffa7
diff --git a/quic/core/quic_crypto_stream.cc b/quic/core/quic_crypto_stream.cc
index e1ee5bf..3081516 100644
--- a/quic/core/quic_crypto_stream.cc
+++ b/quic/core/quic_crypto_stream.cc
@@ -52,11 +52,9 @@
       VARIABLE_LENGTH_INTEGER_LENGTH_1;
   QuicVariableLengthIntegerLength length_length =
       VARIABLE_LENGTH_INTEGER_LENGTH_2;
-  if (!QuicVersionHasLongHeaderLengths(version) &&
-      GetQuicReloadableFlag(quic_fix_get_packet_header_size)) {
+  if (!QuicVersionHasLongHeaderLengths(version)) {
     retry_token_length_length = VARIABLE_LENGTH_INTEGER_LENGTH_0;
     length_length = VARIABLE_LENGTH_INTEGER_LENGTH_0;
-    QUIC_RELOADABLE_FLAG_COUNT_N(quic_fix_get_packet_header_size, 2, 3);
   }
   return QuicPacketCreator::StreamFramePacketOverhead(
       version, static_cast<QuicConnectionIdLength>(connection_id.length()),