Remove remnant of MS SGC second ClientHello.

This code was dead as ssl3_get_client_certificate no longer allows a
ClientHello; the hash would be reset, but then the handshake would fail anyway.

Change-Id: Ib98e6a319c048c263d7ee3a27832ea57bdd0e2ad
Reviewed-on: https://boringssl-review.googlesource.com/2120
Reviewed-by: Adam Langley <agl@google.com>

ssl/s3_both.c

@@ -419,18 +419,6 @@ long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int hash_messa
 			OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
 			goto f_err;
 			}
-		if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
-					(st1 == SSL3_ST_SR_CERT_A) &&
-					(stn == SSL3_ST_SR_CERT_B))
-			{
-			/* At this point we have got an MS SGC second client
-			 * hello (maybe we should always allow the client to
-			 * start a new handshake?). We need to restart the mac.
-			 * Don't increment {num,total}_renegotiations because
-			 * we have not completed the handshake. */
-			ssl3_init_finished_mac(s);
-			}
-
 		s->s3->tmp.message_type= *(p++);
 
 		n2l3(p,l);