Remove unused mock endpoint handler (#34301)

frontend/test/default-handlers.ts

@@ -1,7 +1,6 @@
 import { defaultActivityHandler } from "./handlers/activity-handlers";
 import {
   defaultDeviceHandler,
-  defaultDeviceMappingHandler,
   defaultMacAdminsHandler,
 } from "./handlers/device-handler";
 
@@ -21,7 +20,6 @@ export const baseUrl = (path: string) => {
 // method in the test file itself.
 const handlers = [
   defaultDeviceHandler,
-  defaultDeviceMappingHandler,
   defaultMacAdminsHandler,
   defaultActivityHandler,
 ];

frontend/test/handlers/device-handler.ts

@@ -45,16 +45,6 @@ export const customDeviceHandler = (overrides?: Partial<IDeviceUserResponse>) =>
     return HttpResponse.json(response);
   });
 
-export const defaultDeviceMappingHandler = http.get(
-  baseUrl("/device/:token/device_mapping"),
-  () => {
-    return HttpResponse.json({
-      device_mapping: [createMockDeviceUser()],
-      host_id: 1,
-    });
-  }
-);
-
 export const defaultMacAdminsHandler = http.get(
   baseUrl("/device/:token/macadmins"),
   () => {