Let static use the RPC response json directly (#509)

* Let static use the RPC response json directly

* Put data in static

* Remove useless file

packages/types/src/Metadata/Metadata.spec.ts

@@ -2,13 +2,13 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import compacted from '../json/Metadata.latest.json';
 import Metadata from './index';
 import latestParsed from './latest.substrate.json';
+import rpcData from './static';
 
 describe('Metadata', () => {
   it('decodes latest properly', () => {
-    const decoded = new Metadata(compacted.result);
+    const decoded = new Metadata(rpcData);
     const str = JSON.stringify(decoded.toJSON());
 
     console.error(str);