Remove FirebaseService typing change

Author: hsubox76

packages-exp/app-compat/src/types.ts

@@ -22,7 +22,6 @@
 
 import { FirebaseApp, FirebaseNamespace } from './public-types';
 import { Component, ComponentContainer } from '@firebase/component';
-import { FirebaseApp as FirebaseAppExp } from '@firebase/app-exp';
 
 export interface FirebaseServiceInternals {
   /**
@@ -32,22 +31,11 @@ export interface FirebaseServiceInternals {
   delete(): Promise<void>;
 }
 
-/**
- * Public type for exp Firebase Service - can't use _FirebaseService from
- * @firebase/app-exp because it requires _delete, which isn't visible on the
- * public instance. The -compat packages can only see the public properties
- * of the _delegate exp instance.
- */
-interface FirebaseServiceExp {
-  app: FirebaseAppExp;
-}
-
 // Services are exposed through instances - each of which is associated with a
 // FirebaseApp.
 // eslint-disable-next-line @typescript-eslint/naming-convention
 export interface _FirebaseService {
   app: FirebaseApp;
-  _delegate: FirebaseServiceExp;
   INTERNAL?: FirebaseServiceInternals;
 }