Remove the non-RFC 7539 variants of ChaCha20Poly1305 crypters in QUIC

net/quic/crypto/quic_crypto_server_config.cc

Index: net/quic/crypto/quic_crypto_server_config.cc
diff --git a/net/quic/crypto/quic_crypto_server_config.cc b/net/quic/crypto/quic_crypto_server_config.cc
index 68a56587e4fdb3839f47dd70ff90d57ef11f0fc0..66cb86e1268c347267d5d9c8c69cd913a27651e3 100644
--- a/net/quic/crypto/quic_crypto_server_config.cc
+++ b/net/quic/crypto/quic_crypto_server_config.cc
@@ -296,9 +296,7 @@ QuicServerConfigProtobuf* QuicCryptoServerConfig::GenerateConfig(
   }
   if (FLAGS_quic_crypto_server_config_default_has_chacha20) {
     if (ChaCha20Poly1305Rfc7539Encrypter::IsSupported()) {
-      msg.SetTaglist(kAEAD, kAESG, kCC12, kCC20, 0);
-    } else {
-      msg.SetTaglist(kAEAD, kAESG, kCC12, 0);
+      msg.SetTaglist(kAEAD, kAESG, kCC20, 0);
     }
   } else {
     msg.SetTaglist(kAEAD, kAESG, 0);