Remove misleading comment

Remove a comment that suggested further clean up was required.
DH_free() performs the necessary cleanup.

With thanks to the Open Crypto Audit Project for reporting this issue.
Reviewed-by: NRich Salz <rsalz@openssl.org>

ssl/s3_clnt.c

@@ -2572,8 +2572,6 @@ int ssl3_send_client_key_exchange(SSL *s)
             }
 
             DH_free(dh_clnt);
-
-            /* perhaps clean things up a bit EAY EAY EAY EAY */
         }
 #endif