Simplify signOff rest

src/core/client/framework/lib/rest.ts

@@ -48,7 +48,10 @@ export class RestClient {
     this.tokenGetter = tokenGetter;
   }
 
-  public async fetch<T>(path: string, options: PartialRequestInit): Promise<T> {
+  public async fetch<T = {}>(
+    path: string,
+    options: PartialRequestInit
+  ): Promise<T> {
     let opts = options;
     if (this.tokenGetter) {
       opts = merge({}, options, {

src/core/client/framework/rest/signOff.ts

@@ -1,10 +1,7 @@
 import { RestClient } from "../lib/rest";
 
-// tslint:disable-next-line:no-empty-interface
-export interface SignOffResponse {}
-
 export default function signOff(rest: RestClient) {
-  return rest.fetch<SignOffResponse>("/tenant/auth/local", {
+  return rest.fetch("/tenant/auth/local", {
     method: "DELETE",
   });
 }