Remove cipher_list_by_id.

This is only used in one place where we don't take advantage of it being
sorted anyway.

Change-Id: If6f0d04e975db903e8a93c57c869ea4964c0be37
Reviewed-on: https://boringssl-review.googlesource.com/12062
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/ssl.h

@@ -3787,8 +3787,6 @@ struct ssl_ctx_st {
   uint16_t min_version;
 
   struct ssl_cipher_preference_list_st *cipher_list;
-  /* same as above but sorted for lookup */
-  STACK_OF(SSL_CIPHER) *cipher_list_by_id;
 
   /* cipher_list_tls10 is the list of ciphers when TLS 1.0 or greater is in
    * use. This only applies to server connections as, for clients, the version
@@ -4090,7 +4088,6 @@ struct ssl_st {
 
   /* crypto */
   struct ssl_cipher_preference_list_st *cipher_list;
-  STACK_OF(SSL_CIPHER) *cipher_list_by_id;
 
   /* session info */