removing a hopefully unnecessary include

PiperOrigin-RevId: 495102558
diff --git a/quiche/quic/core/tls_handshaker.cc b/quiche/quic/core/tls_handshaker.cc
index 087602e..159915c 100644
--- a/quiche/quic/core/tls_handshaker.cc
+++ b/quiche/quic/core/tls_handshaker.cc
@@ -10,7 +10,6 @@
 #include "openssl/crypto.h"
 #include "openssl/ssl.h"
 #include "quiche/quic/core/quic_crypto_stream.h"
-#include "quiche/quic/core/tls_client_handshaker.h"
 #include "quiche/quic/platform/api/quic_bug_tracker.h"
 #include "quiche/quic/platform/api/quic_stack_trace.h"