Remove dead SRP SSL_CTRL values.

Change-Id: Id2d3a2a0a3826566376bac2efeefbb54fc55d227
Reviewed-on: https://boringssl-review.googlesource.com/5344
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index f01fee4..0bec5e6 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1747,11 +1747,6 @@
 
 #define SSL_CTRL_EXTRA_CHAIN_CERT 14
 
-#define SSL_CTRL_SET_SRP_ARG 78
-#define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME 79
-#define SSL_CTRL_SET_TLS_EXT_SRP_STRENGTH 80
-#define SSL_CTRL_SET_TLS_EXT_SRP_PASSWORD 81
-
 #define SSL_CTRL_GET_EXTRA_CHAIN_CERTS 82
 #define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS 83