Remove all builtin metadata (#358)

packages/extension-chains/src/index.ts

@@ -9,10 +9,10 @@ import { Metadata, TypeRegistry } from '@polkadot/types';
 
 // imports chain details, generally metadata. For the generation of these,
 // inside the api, run `yarn chain:info --ws <url>`
-import kusama from './kusama';
+// import kusama from './kusama';
 
 const definitions = new Map<string, MetadataDef>(
-  [kusama].map((def) => [def.genesisHash, def])
+  // [kusama].map((def) => [def.genesisHash, def])
 );
 
 const expanded = new Map<string, Chain>();