relnote: Deprecate flag quic_disable_pre_32

net/quic/core/crypto/crypto_protocol.h

Index: net/quic/core/crypto/crypto_protocol.h
diff --git a/net/quic/core/crypto/crypto_protocol.h b/net/quic/core/crypto/crypto_protocol.h
index 288106622c9e7dc777bdfecd27c1d5adbfa114d2..580bd187aaa04703bfa15a4a30538679fbae3ee2 100644
--- a/net/quic/core/crypto/crypto_protocol.h
+++ b/net/quic/core/crypto/crypto_protocol.h
@@ -234,11 +234,6 @@ const size_t kNonceSize = 32;  // Size in bytes of the connection nonce.
 
 const size_t kOrbitSize = 8;  // Number of bytes in an orbit value.
 
-// kProofSignatureLabel is prepended to server configs before signing to avoid
-// any cross-protocol attacks on the signature.
-// TODO(rch): Remove this when QUIC_VERSION_30 is removed.
-const char kProofSignatureLabelOld[] = "QUIC server config signature";
-
 // kProofSignatureLabel is prepended to the CHLO hash and server configs before
 // signing to avoid any cross-protocol attacks on the signature.
 const char kProofSignatureLabel[] = "QUIC CHLO and server config signature";