Remove Pivotal Tile install doc

doc/install/pivotal/index.md

 ---
-stage: none
-group: unassigned
-info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+redirect_to: '../index.md'
+remove_date: '2022-03-08'
 ---
 
-# GitLab Pivotal Tile **(PREMIUM SELF)**
+This document was removed. For information about installing GitLab, see [this page](../index.md).
 
-WARNING:
-As of September 13, 2017, the GitLab Enterprise Plus for Pivotal Cloud Foundry
-tile on Pivotal Network has reached its End of Availability ("EoA") and is no
-longer available for download or sale through Pivotal. Current customers with
-active subscriptions continue to receive support from GitLab through their
-subscription term. Pivotal and GitLab are collaborating on creating a new
-Kubernetes-based tile for the Pivotal Container Service. Please contact GitLab
-support with any questions regarding GitLab Enterprise Plus for Pivotal Cloud Foundry.
-
-Original article: <https://docs.pivotal.io/partners/gitlab/index.html>.
+<!-- This redirect file can be deleted after <2022-03-08>. -->
+<!-- Before deletion, see: https://docs.gitlab.com/ee/development/documentation/#move-or-rename-a-page -->