Deprecate 3.12 (#55505)

Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>
Co-authored-by: Felicity Chapman <felicitymay@github.com>
Co-authored-by: Sarah Schneider <sarahs@github.com>

content/graphql/index.md

@@ -12,7 +12,6 @@ featuredLinks:
   popular:
     - /graphql/overview/explorer
     - /graphql/overview/public-schema
-    - /graphql/overview/schema-previews
     - /graphql/guides/using-pagination-in-the-graphql-api
   guideCards:
     - /graphql/guides/migrating-from-rest-to-graphql
@@ -23,6 +22,7 @@ changelog:
 layout: product-landing
 redirect_from:
   - /v4
+  - /graphql/overview/schema-previews
 versions:
   fpt: '*'
   ghec: '*'

content/graphql/overview/breaking-changes.md

@@ -19,10 +19,6 @@ Breaking changes are any changes that might require action from our integrators.
 * **Breaking:** Changes that will break existing queries to the GraphQL API. For example, removing a field would be a breaking change.
 * **Dangerous:** Changes that won't break existing queries but could affect the runtime behavior of clients. Adding an enum value is an example of a dangerous change.
 
-{% ifversion ghes < 3.13 %}
-We strive to provide stable APIs for our integrators. When a new feature is still evolving, we release it behind a [schema preview](/graphql/overview/schema-previews).
-{% endif %}
-
 We'll announce upcoming breaking changes at least three months before making changes to the GraphQL schema, to give integrators time to make the necessary adjustments. Changes go into effect on the first day of a quarter (January 1st, April 1st, July 1st, or October 1st). For example, if we announce a change on January 15th, it will be made on July 1st.
 
 <!-- Content after this section is automatically generated -->

content/graphql/overview/changelog.md

@@ -1,6 +1,6 @@
 ---
 title: Changelog
-intro: 'The GraphQL schema changelog is a list of recent and upcoming changes to our GraphQL API schema. It includes backwards-compatible changes{% ifversion ghes < 3.13 %}, schema previews,{% endif %} and upcoming breaking changes.'
+intro: 'The GraphQL schema changelog is a list of recent and upcoming changes to our GraphQL API schema. It includes backwards-compatible changes and upcoming breaking changes.'
 redirect_from:
   - /v4/changelog
 versions:

content/graphql/overview/index.md

@@ -8,7 +8,6 @@ versions:
 children:
   - /about-the-graphql-api
   - /public-schema
-  - /schema-previews
   - /breaking-changes
   - /changelog
   - /explorer

content/graphql/overview/schema-previews.md

@@ -1,22 +0,0 @@
----
-title: Schema previews
-intro: 'You can preview upcoming features and changes to the {% data variables.product.prodname_dotcom %} GraphQL schema before they are added to the {% data variables.product.prodname_dotcom %} GraphQL API.'
-redirect_from:
-  - /v4/previews
-versions:
-  ghes: '<=3.12'
-topics:
-  - API
-autogenerated: graphql
----
-
-## About schema previews
-
-During the preview period, we may change some features based on developer feedback. If we do make changes, we'll announce them on the [developer blog](https://developer.github.com/changes/) without advance notice.
-
-To access a schema preview, you'll need to provide a custom [media type](/rest/overview/media-types) in the `Accept` header for your requests. Feature documentation for each preview specifies which custom media type to provide.
-
-> [!NOTE]
-> The GraphQL schema members under preview cannot be accessed via the Explorer at this time.
-
-<!-- Content after this section is automatically generated -->