Revert "feat(hybrid-cloud): Activate CustomerDomainMiddleware (#37159)"

This reverts commit 3de43ca7763b17ca341fa85f508ce396ea3dc3cb.

Co-authored-by: aleal via Slack <aleal@sentry.io>

src/sentry/conf/server.py

@@ -286,7 +286,6 @@ MIDDLEWARE = (
     "django.contrib.sessions.middleware.SessionMiddleware",
     "django.middleware.csrf.CsrfViewMiddleware",
     "sentry.middleware.auth.AuthenticationMiddleware",
-    "sentry.middleware.customer_domain.CustomerDomainMiddleware",
     "sentry.middleware.user.UserActiveMiddleware",
     "sentry.middleware.sudo.SudoMiddleware",
     "sentry.middleware.superuser.SuperuserMiddleware",