Remove some redundant OPENSSL_cleanses.

Anything heap-allocated is automatically cleansed.

Change-Id: I88034251bcba7a3e74c0d1ec887dff5a4c16fa8b
Reviewed-on: https://boringssl-review.googlesource.com/20664
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/ssl/handshake.cc b/ssl/handshake.cc
index cef8a15..6746582 100644
--- a/ssl/handshake.cc
+++ b/ssl/handshake.cc
@@ -144,12 +144,6 @@
 }
 
 SSL_HANDSHAKE::~SSL_HANDSHAKE() {
-  OPENSSL_cleanse(secret, sizeof(secret));
-  OPENSSL_cleanse(early_traffic_secret, sizeof(early_traffic_secret));
-  OPENSSL_cleanse(client_handshake_secret, sizeof(client_handshake_secret));
-  OPENSSL_cleanse(server_handshake_secret, sizeof(server_handshake_secret));
-  OPENSSL_cleanse(client_traffic_secret_0, sizeof(client_traffic_secret_0));
-  OPENSSL_cleanse(server_traffic_secret_0, sizeof(server_traffic_secret_0));
   OPENSSL_free(cookie);
   OPENSSL_free(key_share_bytes);
   OPENSSL_free(ecdh_public_key);