Remove a few unnecessary SSL3_ENC_METHOD hooks.

As things stand now, they don't actually do anything.

Change-Id: I9f8b4cbf38a0dffabfc5265805c52bb8d7a8fb0d
Reviewed-on: https://boringssl-review.googlesource.com/6837
Reviewed-by: Adam Langley <alangley@gmail.com>
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index 569599d..2c1a32f 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -1754,8 +1754,8 @@
   }
   ssl->state = SSL3_ST_CW_KEY_EXCH_B;
 
-  ssl->session->master_key_length = ssl->enc_method->generate_master_secret(
-      ssl, ssl->session->master_key, pms, pms_len);
+  ssl->session->master_key_length =
+      tls1_generate_master_secret(ssl, ssl->session->master_key, pms, pms_len);
   if (ssl->session->master_key_length == 0) {
     goto err;
   }