plugins: migrate usage of deprecated IdentityApi methods

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/splunk-on-call/src/components/Incident/Incidents.test.tsx

@@ -20,24 +20,15 @@ import { TestApiRegistry, wrapInTestApp } from '@backstage/test-utils';
 import { splunkOnCallApiRef } from '../../api';
 import { MOCK_TEAM, MOCK_INCIDENT } from '../../api/mocks';
 
-import {
-  alertApiRef,
-  IdentityApi,
-  identityApiRef,
-} from '@backstage/core-plugin-api';
+import { alertApiRef } from '@backstage/core-plugin-api';
 import { ApiProvider } from '@backstage/core-app-api';
 
-const mockIdentityApi: Partial<IdentityApi> = {
-  getUserId: () => 'test',
-};
-
 const mockSplunkOnCallApi = {
   getIncidents: jest.fn(),
   getTeams: jest.fn(),
 };
 const apis = TestApiRegistry.from(
   [alertApiRef, {}],
-  [identityApiRef, mockIdentityApi],
   [splunkOnCallApiRef, mockSplunkOnCallApi],
 );