chore: fix api-reports warnings

Signed-off-by: blam <ben@blam.sh>

plugins/search-backend/report-alpha.api.md

@@ -9,9 +9,5 @@ import { BackendFeature } from '@backstage/backend-plugin-api';
 const _feature: BackendFeature;
 export default _feature;
 
-// Warnings were encountered during analysis:
-//
-// src/alpha.d.ts:2:15 - (ae-undocumented) Missing documentation for "_feature".
-
 // (No @packageDocumentation comment for this package)
 ```

plugins/search-backend/report.api.md

@@ -33,9 +33,4 @@ export type RouterOptions = {
   auth?: AuthService;
   httpAuth?: HttpAuthService;
 };
-
-// Warnings were encountered during analysis:
-//
-// src/service/router.d.ts:11:1 - (ae-undocumented) Missing documentation for "RouterOptions".
-// src/service/router.d.ts:25:1 - (ae-undocumented) Missing documentation for "createRouter".
 ```