ERP5Storage: drop bulk_get support

src/jio.storage/erp5storage.js

@@ -398,7 +398,7 @@
   ERP5Storage.prototype.hasCapacity = function (name) {
     return ((name === "list") || (name === "query") ||
             (name === "select") || (name === "limit") ||
-            (name === "sort")) || (name === "bulk_get");
+            (name === "sort"));
   };
 
   function isSingleLocalRoles(parsed_query) {