Deprecate gfe2_reloadable_flag_quic_fix_extra_padding_bytes.

PiperOrigin-RevId: 328397159
Change-Id: Icb651e92f45b16cac1ce64cb9170a9e20438a2ba
diff --git a/quic/core/quic_packet_creator_test.cc b/quic/core/quic_packet_creator_test.cc
index fcd9653..ce9e692 100644
--- a/quic/core/quic_packet_creator_test.cc
+++ b/quic/core/quic_packet_creator_test.cc
@@ -3820,12 +3820,8 @@
   creator_.Flush();
   ASSERT_FALSE(packets_[0].nonretransmittable_frames.empty());
   QuicFrame padding = packets_[0].nonretransmittable_frames[0];
-  if (GetQuicReloadableFlag(quic_fix_extra_padding_bytes)) {
-    // Verify stream frame expansion is excluded.
-    padding.padding_frame.num_padding_bytes = 3;
-  } else {
-    padding.padding_frame.num_padding_bytes = 4;
-  }
+  // Verify stream frame expansion is excluded.
+  padding.padding_frame.num_padding_bytes = 3;
 }
 
 TEST_F(QuicPacketCreatorMultiplePacketsTest,