diff --git a/plugins/libplugin.c b/plugins/libplugin.c
index b522dbcaf..f28f5be72 100644
--- a/plugins/libplugin.c
+++ b/plugins/libplugin.c
@@ -345,21 +345,6 @@ command_success(struct command *cmd, const struct json_out *result)
 	return command_complete(cmd, js);
 }
 
-struct command_result *WARN_UNUSED_RESULT
-command_success_str(struct command *cmd, const char *str)
-{
-	struct json_stream *js = jsonrpc_stream_start(cmd);
-
-	if (str)
-		json_add_string(js, "result", str);
-	else {
-		/* Use an empty object if they don't want anything. */
-		json_object_start(js, "result");
-		json_object_end(js);
-	}
-	return command_complete(cmd, js);
-}
-
 struct command_result *command_done_err(struct command *cmd,
 					errcode_t code,
 					const char *errmsg,
@@ -904,7 +889,7 @@ static struct command_result *handle_init(struct command *cmd,
 	if (with_rpc)
 		io_new_conn(p, p->rpc_conn->fd, rpc_conn_init, p);
 
-	return command_success_str(cmd, NULL);
+	return command_success(cmd, json_out_obj(cmd, NULL, NULL));
 }
 
 char *u64_option(const char *arg, u64 *i)
diff --git a/plugins/libplugin.h b/plugins/libplugin.h
index a70fa8078..6ae600fd9 100644
--- a/plugins/libplugin.h
+++ b/plugins/libplugin.h
@@ -181,11 +181,6 @@ struct command_result *command_err_raw(struct command *cmd,
 struct command_result *WARN_UNUSED_RESULT
 command_success(struct command *cmd, const struct json_out *result);
 
-/* Simple version where we just want to send a string, or NULL means an empty
- * result object.  @cmd cannot be NULL. */
-struct command_result *WARN_UNUSED_RESULT
-command_success_str(struct command *cmd, const char *str);
-
 /* End a hook normally (with "result": "continue") */
 struct command_result *WARN_UNUSED_RESULT
 command_hook_success(struct command *cmd);