Remove X509_REVOKED.sequence.

This is filled in by X509_CRL_sort but never used.

Change-Id: Ifacd56fcc090386faa6c11b73b44191a31221ef8
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/50545
Reviewed-by: Adam Langley <agl@google.com>

crypto/x509/x509cset.c

diff --git a/crypto/x509/x509cset.c b/crypto/x509/x509cset.c
index 7816d73..316f084 100644
--- a/crypto/x509/x509cset.c
+++ b/crypto/x509/x509cset.c
@@ -116,16 +116,8 @@
 
 int X509_CRL_sort(X509_CRL *c)
 {
-    size_t i;
-    X509_REVOKED *r;
-    /*
-     * sort the data so it will be written in serial number order
-     */
+    /* Sort the data so it will be written in serial number order. */
     sk_X509_REVOKED_sort(c->crl->revoked);
-    for (i = 0; i < sk_X509_REVOKED_num(c->crl->revoked); i++) {
-        r = sk_X509_REVOKED_value(c->crl->revoked, i);
-        r->sequence = i;
-    }
     c->crl->enc.modified = 1;
     return 1;
 }

include/openssl/x509.h

diff --git a/include/openssl/x509.h b/include/openssl/x509.h
index 0f117e2..0964780 100644
--- a/include/openssl/x509.h
+++ b/include/openssl/x509.h
@@ -257,7 +257,6 @@
   STACK_OF(GENERAL_NAME) *issuer;
   // Revocation reason
   int reason;
-  int sequence;  // load sequence
 };
 
 DEFINE_STACK_OF(X509_REVOKED)