gfe-relnote: n/a - Rephrase obsolete TODO which was left over from when v40 was added.

When v40 was effectively reverted, this TODO was not removed. However, once v44 was added the TODO became newly relevant.

PiperOrigin-RevId: 276581226
Change-Id: Ib3564bb870f4cdb2a66b480c1805b16dd35e6a25
diff --git a/quic/core/quic_types.h b/quic/core/quic_types.h
index efbda04..0146851 100644
--- a/quic/core/quic_types.h
+++ b/quic/core/quic_types.h
@@ -308,7 +308,8 @@
   PACKET_3BYTE_PACKET_NUMBER = 3,  // Used in versions 45+.
   PACKET_4BYTE_PACKET_NUMBER = 4,
   IETF_MAX_PACKET_NUMBER_LENGTH = 4,
-  // TODO(rch): Remove this when we remove QUIC_VERSION_39.
+  // TODO(rch): Remove these when we remove QUIC_VERSION_43 since these values
+  // are not representable with v46 and above.
   PACKET_6BYTE_PACKET_NUMBER = 6,
   PACKET_8BYTE_PACKET_NUMBER = 8
 };