Revert unnecessary changes

Author: gastonfournier

src/repository/polling-fetcher.ts

@@ -1,5 +1,5 @@
 import { EventEmitter } from 'events';
-import { ClientFeaturesDelta, ClientFeaturesResponse, parseClientFeaturesDelta } from '../feature';
+import { parseClientFeaturesDelta } from '../feature';
 import { get } from '../request';
 import getUrl from '../url-utils';
 import { UnleashEvents } from '../events';
@@ -151,7 +151,7 @@ export class PollingFetcher extends EventEmitter implements FetcherInterface {
       } else if (res.ok) {
         nextFetch = this.countSuccess();
         try {
-          const data = (await res.json()) as ClientFeaturesResponse | ClientFeaturesDelta;
+          const data = await res.json();
           if (res.headers.get('etag') !== null) {
             this.etag = res.headers.get('etag') as string;
           } else {
@@ -168,9 +168,9 @@ export class PollingFetcher extends EventEmitter implements FetcherInterface {
           }
 
           if (this.options.mode.type === 'polling' && this.options.mode.format === 'delta') {
-            await this.options.onSaveDelta(parseClientFeaturesDelta(data as ClientFeaturesDelta));
+            await this.options.onSaveDelta(parseClientFeaturesDelta(data));
           } else {
-            await this.options.onSave(data as ClientFeaturesResponse, true);
+            await this.options.onSave(data, true);
           }
         } catch (err) {
           this.emit(UnleashEvents.Error, err);

src/test/unleash.network.retries.test.ts

@@ -13,7 +13,7 @@ test('should retry on error', (t) =>
       res.end();
     });
 
-    server.listen(0, '127.0.0.1', () => {
+    server.listen(() => {
       // @ts-expect-error
       const { port } = server.address();
 
@@ -33,14 +33,8 @@ test('should retry on error', (t) =>
       });
     });
     server.on('error', (e) => {
-      if ((e as NodeJS.ErrnoException).code === 'EPERM') {
-        t.pass();
-        server.close();
-        resolve();
-        return;
-      }
-      server.close();
       console.error(e);
       t.fail(e.message);
+      server.close();
     });
   }));