sql: limit 1 for UPDATE and DELETE is not supported by the SQL standard and postgresql

(see: https://www.postgresql.org/message-id/flat/1291109101.26137.35.camel%40pcd12478 )

include/queue_fn.php

@@ -118,7 +118,7 @@ function queue_deliver($outq, $immediate = false) {
 					dbesc($base)
 				);
 			}
-			q("update dreport set dreport_result = '%s', dreport_time = '%s' where dreport_queue = '%s' limit 1",
+			q("update dreport set dreport_result = '%s', dreport_time = '%s' where dreport_queue = '%s'",
 				dbesc('accepted for delivery'),
 				dbesc(datetime_convert()),
 				dbesc($outq['outq_hash'])