Revert "Mark instances as unreachable when returning a 403 from an object fetch"

This reverts commit d472bafec19cee269e7c943bafae7c805785acd7.

changelog.d/handle_object_fetch_failures.change

@@ -1,3 +1,2 @@
 Remote object fetch failures will prevent the object fetch job from retrying if the object has been deleted or the fetch was denied with a 403 due to instance block behavior with authorized_fetch enabled.
-Mark instances as unreachable when object fetch is denied due to instance block and authorized_fetch.
 Skip fetching objects from unreachable instances.

lib/pleroma/object/fetcher.ex

@@ -344,7 +344,6 @@ def get_object(id) do
       end
     else
       {:ok, %{status: 403}} ->
-        Instances.set_consistently_unreachable(id)
         {:error, "Object fetch has been denied"}
 
       {:ok, %{status: code}} when code in [404, 410] ->

test/pleroma/object/fetcher_test.exs

@@ -419,18 +419,6 @@ test "handle HTTP 404 response" do
                )
     end
 
-    test "handle HTTP 403 response" do
-      object_id = "https://octodon.social/users/cwebber/statuses/111647596861000656"
-      Instances.set_reachable(object_id)
-
-      assert Instances.reachable?(object_id)
-
-      assert {:error, "Object fetch has been denied"} ==
-               Fetcher.fetch_object_from_id(object_id)
-
-      refute Instances.reachable?(object_id)
-    end
-
     test "it can fetch pleroma polls with attachments" do
       {:ok, object} =
         Fetcher.fetch_object_from_id("https://patch.cx/objects/tesla_mock/poll_attachment")