Announce deprecation of Pseudonymizer

data/deprecations/14-7-pseudonymizer.yml

+- name: "Pseudonymizer" # The name of the feature to be deprecated
+  announcement_milestone: "14.7" # The milestone when this feature was first announced as deprecated.
+  announcement_date: "2021-01-22" # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
+  removal_milestone: "15.0" # The milestone when this feature is planned to be removed
+  removal_date: "2021-06-22" # This should almost always be the 22nd of a month (YYYY-MM-22), the date of the milestone release when this feature is planned to be removed.
+  body: | # Do not modify this line, instead modify the lines below.
+    The Pseudonymizer feature is generally unused,
+    can cause production issues with large databases,
+    and can interfere with object storage development.
+    It is now considered deprecated, and will be removed in GitLab 15.0.
+  documentation_url: "https://docs.gitlab.com/ee/administration/pseudonymizer.html"
+  issue_url: "https://gitlab.com/gitlab-org/gitlab/-/issues/219952"

doc/update/deprecations.md

@@ -244,6 +244,16 @@ In milestone 15.0, we will remove the `pipelines` attribute from the API respons
 Announced: 2021-11-22
 Planned removal: 2022-05-22
 
+### Pseudonymizer
+
+The Pseudonymizer feature is generally unused,
+can cause production issues with large databases,
+and can interfere with object storage development.
+It is now considered deprecated, and will be removed in GitLab 15.0.
+
+Announced: 2021-01-22
+Planned removal: 2021-06-22
+
 ### REST API Runner will not contain `paused`
 
 The GitLab Runner REST and GraphQL API endpoints will not return `paused` or `active` as a status in GitLab 15.0.