Remove custom media type info from REST stub file (#50017)

Author: jhosman

content/rest/pulls/pulls.md

@@ -18,21 +18,6 @@ You can list, view, edit, create, and merge pull requests using the REST API. Fo
 
 Pull requests are a type of issue. Any actions that are available in both pull requests and issues, like managing assignees, labels, and milestones, are provided by the REST API to manage issues. For more information, see "[AUTOTITLE](/rest/issues)."
 
-### Custom media types for pull requests
-
-These are the supported media types for pull requests.
-
-    application/vnd.github.raw+json
-    application/vnd.github.text+json
-    application/vnd.github.html+json
-    application/vnd.github.full+json
-    application/vnd.github.diff
-    application/vnd.github.patch
-
-For more information, see "[AUTOTITLE](/rest/overview/media-types)."
-
-If a diff is corrupt, contact {% data variables.contact.contact_support %}. Include the repository name and pull request ID in your message.
-
 ### Link Relations
 
 Pull requests have these possible link relations: