Remove unused RSA_METHOD field.

We can finally trim this thing.

Change-Id: I8efd0be23ca11e39712e34734be5cdc70e8ffdc4
Reviewed-on: https://boringssl-review.googlesource.com/20604
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/include/openssl/rsa.h b/include/openssl/rsa.h
index 0ddc952..d463f85 100644
--- a/include/openssl/rsa.h
+++ b/include/openssl/rsa.h
@@ -577,13 +577,6 @@
   int (*sign)(int type, const uint8_t *m, unsigned int m_length,
               uint8_t *sigret, unsigned int *siglen, const RSA *rsa);
 
-  // Ignored. Set this to NULL.
-  // TODO(davidben): Remove this when
-  // https://github.com/google/conscrypt/commit/bb0571e358e95e1c70ac7a6984fc4d7236cac72f
-  // is in all BoringSSL consumers.
-  int (*encrypt)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
-                 const uint8_t *in, size_t in_len, int padding);
-
   // These functions mirror the |RSA_*| functions of the same name.
   int (*sign_raw)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
                   const uint8_t *in, size_t in_len, int padding);