Allow type for Express.Request.user (#27339)

types/passport/index.d.ts

@@ -12,7 +12,7 @@ declare global {
     namespace Express {
         interface Request {
             authInfo?: any;
-            user?: User;
+            user?: any;
 
             // These declarations are merged into express's Request type
             login(user: any, done: (err: any) => void): void;
@@ -26,9 +26,6 @@ declare global {
             isAuthenticated(): boolean;
             isUnauthenticated(): boolean;
         }
-        interface User {
-            [_: string]: any;
-        }
     }
 }