Remove remnants of DHE support.

net/ssl/ssl_config.h

Index: net/ssl/ssl_config.h
diff --git a/net/ssl/ssl_config.h b/net/ssl/ssl_config.h
index 0cc7f55201bc060c0adaba85e973c1214aeffae2..1188a0d128484acead0114e9474c0ea09c9abb54 100644
--- a/net/ssl/ssl_config.h
+++ b/net/ssl/ssl_config.h
@@ -103,11 +103,11 @@ struct NET_EXPORT SSLConfig {
   // to them as far as downgrades are concerned, so this should only be used for
   // measurement of ciphers not to be carried long-term. It is no fix for
   // servers with bad configurations without full removal.
+  //
+  // TODO(davidben): This is no longer used. Remove
+  // it. https://crbug.com/684730.
   bool deprecated_cipher_suites_enabled;
 
-  // Enables DHE cipher suites.
-  bool dhe_enabled;
-
   bool channel_id_enabled;   // True if TLS channel ID extension is enabled.
 
   // List of Token Binding key parameters supported by the client. If empty,