service: page-server: allow requesting page-server without setting any ps_info

Since we now can return port to user in autobind case, it's ok to request
page-server without setting ps_info.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-service.c

@@ -517,11 +517,6 @@ static int start_page_server_req(int sk, CriuOpts *req)
 	CriuPageServerInfo ps = CRIU_PAGE_SERVER_INFO__INIT;
 	struct ps_info info;
 
-	if (!req->ps) {
-		pr_err("No page server info in message\n");
-		goto out;
-	}
-
 	if (pipe(start_pipe)) {
 		pr_perror("No start pipe");
 		goto out;