Deprecate gfe2_reloadable_flag_quic_check_encryption_level_in_fast_path.

PiperOrigin-RevId: 331551073
Change-Id: Id3a7e570db2fffa9cfd1670b526427094c7c73e9
diff --git a/quic/core/quic_packet_creator.cc b/quic/core/quic_packet_creator.cc
index 74c96ac..2e507a0 100644
--- a/quic/core/quic_packet_creator.cc
+++ b/quic/core/quic_packet_creator.cc
@@ -1340,12 +1340,9 @@
     bool fin,
     size_t total_bytes_consumed) {
   DCHECK(!QuicUtils::IsCryptoStreamId(transport_version(), id));
-  if (GetQuicReloadableFlag(quic_check_encryption_level_in_fast_path)) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_check_encryption_level_in_fast_path);
-    if (AttemptingToSendUnencryptedStreamData()) {
-      return QuicConsumedData(total_bytes_consumed,
-                              fin && (total_bytes_consumed == write_length));
-    }
+  if (AttemptingToSendUnencryptedStreamData()) {
+    return QuicConsumedData(total_bytes_consumed,
+                            fin && (total_bytes_consumed == write_length));
   }
 
   while (total_bytes_consumed < write_length &&