fewer NO_ENGINE #ifdef's

Make setup_engine be a dummy if NO_ENGINE is enabled.
The option is not enabled if NO_ENGINE is enabled, so the one "wasted"
variable just sits there. Removes some variables and code.

Reviewed-by: Richard Levitte <levitte@openssl.org>

apps/s_server.c

@@ -1378,7 +1378,7 @@ int s_server_main(int argc, char *argv[])
             session_id_prefix = opt_arg();
             break;
         case OPT_ENGINE:
-            engine_id = opt_arg();
+            e = setup_engine(opt_arg(), 1);
             break;
         case OPT_RAND:
             inrand = opt_arg();
@@ -1449,10 +1449,6 @@ int s_server_main(int argc, char *argv[])
     }
 #endif
 
-#ifndef OPENSSL_NO_ENGINE
-    e = setup_engine(engine_id, 1);
-#endif
-
     if (!app_passwd(passarg, dpassarg, &pass, &dpass)) {
         BIO_printf(bio_err, "Error getting password\n");
         goto end;