Remove X509_CINF_get_issuer and X509_CINF_get_extensions.

The X509_CINF_* macros were removed before OpenSSL 1.0.2 was released
but after we forked. X509_CINF_set_modified and X509_CINF_get_signature
have some users to clean up, but these two are unused.

(OpenSSL 1.1.x's new X.509 API effectively no longer exposes X509_CINF
at all. If we could align, that would simplify switching to retaining
the full encoding rather than just TBSCertificate. But I think we'll
need to add some functions to replace a few use cases they missed.)

Update-Note: Two unused macros were removed. If there were uses, the
X509-level accessors can be used instead.

Change-Id: I9b5c7c08196885ee0bccc2658b1ad177bf3100e7
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/41807
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
diff --git a/include/openssl/x509.h b/include/openssl/x509.h
index 3efaea8..65c4e3a 100644
--- a/include/openssl/x509.h
+++ b/include/openssl/x509.h
@@ -506,8 +506,6 @@
 #define X509_CRL_get_REVOKED(x) ((x)->crl->revoked)
 
 #define X509_CINF_set_modified(c) ((c)->enc.modified = 1)
-#define X509_CINF_get_issuer(c) (&(c)->issuer)
-#define X509_CINF_get_extensions(c) ((c)->extensions)
 #define X509_CINF_get_signature(c) ((c)->signature)
 
 OPENSSL_EXPORT void X509_CRL_set_default_method(const X509_CRL_METHOD *meth);