Deprecate FLAG_quic_validate_stk_without_scid

net/quic/quic_flags.cc

Index: net/quic/quic_flags.cc
diff --git a/net/quic/quic_flags.cc b/net/quic/quic_flags.cc
index ad938b67339d56909b03210db1b76042317c7f9a..04cda181e3556e584b211c82e21c9c22d85dec0b 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -86,11 +86,6 @@ bool FLAGS_quic_require_fix = true;
 // If true, headers stream will support receiving PUSH_PROMISE frames.
 bool FLAGS_quic_supports_push_promise = false;
 
-// If true, QUIC servers will attempt to validate a client's source
-// address token using the primary config, even if no server config id
-// is present in the client hello.
-bool FLAGS_quic_validate_stk_without_scid = true;
-
 // If true, QUIC will support RFC 7539 variants of ChaCha20 Poly1305.
 bool FLAGS_quic_use_rfc7539 = true;