Revert "LPS-38694 SF"

This reverts commit 377f247965bfe6572be98ef4eacf4b492ceba4eb.
Revert "LPS-38694 Subscriptions to content on Private Pages persist after leaving the Site in the My Subscriptions Portlet"

This reverts commit 05a3b3b7d17f6e1a2c8f3b69ddccda5bc0b15843.