remove schema downloaded cache as @romain suggested

gadget_json_generated_form.js

@@ -173,17 +173,7 @@
     }
     hash = url.hash;
     url = url.href;
-    return RSVP.Queue()
-      .push(function () {
-        if (g.props.schema_cache.hasOwnProperty(download_url)) {
-          return g.props.schema_cache[download_url];
-        }
     return downloadJSON(download_url)
-          .push(function (json) {
-            g.props.schema_cache[download_url] = json;
-            return json;
-          });
-      })
       .push(function (json) {
         checkCircular(g, path, url);
         return resolveLocalReference(json, hash);
@@ -503,7 +493,6 @@
       // it's need for schema uri computation
       g.props.schema = {};
       g.props.schema_map = {};
-      g.props.schema_cache = {};
       // schema_required_urls[path] = [
       // stack required urls, on every unrequired field stack begining from []
       // "url1",