Remove content app redirect for manifest fetching

fixes: #1974
Assisted by: claude-sonnet-4.6

Author: gerrod3

CHANGES/1974.feature

@@ -0,0 +1 @@
+Manifest data is now served directly from the registry API instead of issuing a redirect to the content app.

pulp_container/app/content.py

@@ -17,4 +17,3 @@
         )
     ]
 )
-app.add_routes([web.get(PREFIX + r"{path:.+}/manifests/{tag_name}", registry.get_tag)])

pulp_container/app/redirects.py

@@ -4,9 +4,7 @@
 from django.core.exceptions import ObjectDoesNotExist
 from django.shortcuts import redirect
 
-from pulp_container.app.exceptions import ManifestNotFound
-from pulp_container.app.utils import get_accepted_media_types
-from pulp_container.constants import BLOB_CONTENT_TYPE, MEDIA_TYPE
+from pulp_container.constants import BLOB_CONTENT_TYPE
 
 
 class CommonRedirects:
@@ -39,25 +37,6 @@ def redirect_to_content_app(self, content_type, content_id):
             )
         )
 
-    def issue_manifest_redirect(self, manifest):
-        """
-        Issue a redirect for the passed manifest.
-        """
-        return self.redirect_to_content_app("manifests", manifest.digest)
-
-    def issue_tag_redirect(self, tag):
-        """
-        Issue a redirect for the passed tag.
-        """
-        manifest_media_type = tag.tagged_manifest.media_type
-        if (
-            manifest_media_type not in get_accepted_media_types(self.request.headers)
-            and manifest_media_type != MEDIA_TYPE.MANIFEST_V1
-        ):
-            raise ManifestNotFound(reference=tag.name)
-
-        return self.redirect_to_content_app("manifests", tag.name)
-
 
 class FileStorageRedirects(CommonRedirects):
     """