fix(session-middleware): don't hardcode database ttl

The cookie expiration is taken from the config,
but the expiration of session data in the database was hardcoded.

This removes the hardcoded value, so TypeormStore defaults
to cookie.maxAge.

References:
https://github.com/nykula/connect-typeorm#options
https://github.com/expressjs/session#cookiemaxage
Signed-off-by: David Mehren <git@herrmehren.de>

src/utils/session.ts

@@ -32,7 +32,6 @@ export function setupSessionMiddleware(
       saveUninitialized: false,
       store: new TypeormStore({
         cleanupLimit: 2,
-        ttl: 86400,
       }).connect(app.get<Repository<Session>>(getRepositoryToken(Session))),
     }),
   );