Move files to trash.

3.2

If you don’t use the SceneDelegate.swift file,
remove the reference to it in the Info.plist.

Open the Info.plist file in the App Clip group.
Delete the entire dictionary entry for
Application Scene Manifest.

Step 4 - Share build configurations

This step isn’t necessary for add-to-app projects
since add-to-app projects have their custom build
configurations and versions.

4.1

Back in the project settings,
select the project entry now rather than any targets.

In the Info tab, under the Configurations
expandable group, expand the
Debug, Profile, and Release entries.

For each, select the same value from the drop-down menu
for the App Clip target as the entry selected for the
normal app target.