shadow: remove empty /bin from package

This avoids tripping the usrmerge linter.

Author: OddBloke

shadow.yaml

@@ -184,6 +184,9 @@ subpackages:
           mkdir -p ${{targets.subpkgdir}}/etc
           mv ${{targets.destdir}}/etc/subuid ${{targets.subpkgdir}}/etc/
           mv ${{targets.destdir}}/etc/subgid ${{targets.subpkgdir}}/etc/
+
+          # Leaving this empty directory trips up the usrmerge linter
+          rmdir ${{targets.destdir}}/bin
     description: Utilities for using subordinate UIDs and GIDs
     dependencies:
       runtime: