remove ref to QueryId in README

README.md

@@ -74,7 +74,7 @@ Then running `$ diesel migration run` will generate code something like:
 // src/schema.rs -- autogenerated
 
 pub mod sql_types {
-    #[derive(diesel::sql_types::SqlType, diesel::query_builder::QueryId)]
+    #[derive(diesel::sql_types::SqlType)]
     #[diesel(postgres_type(name = "my_enum"))]
     pub struct MyEnum;
 }