Remove dead field from CIPHER_ORDER.

It's unused.

Change-Id: I039ecc40f90cbeed6e95b1dd8414161670ae5b6c
Reviewed-on: https://boringssl-review.googlesource.com/4612
Reviewed-by: Adam Langley <agl@google.com>

ssl/ssl_cipher.c

diff --git a/ssl/ssl_cipher.c b/ssl/ssl_cipher.c
index 7e0ade8..2cafeb9 100644
--- a/ssl/ssl_cipher.c
+++ b/ssl/ssl_cipher.c
@@ -173,7 +173,6 @@
 typedef struct cipher_order_st {
   const SSL_CIPHER *cipher;
   int active;
-  int dead;
   int in_group;
   struct cipher_order_st *next, *prev;
 } CIPHER_ORDER;