This Anki add-on allows you to import only scheduling information from an apkg file.

It can be accessed from Tools > Import scheduling info from deck package.

Importing from apkg files using the new compression format in 2.1.50+ is supported for 2.1.50+.

You can download the add-on from AnkiWeb: 7411103.

Note: This add-on is currently in beta and hasn't received much testing yet. Please report any issues you encounter.