don't depend on essential package, backup.sh extension inclusion intentional

debian/control

@@ -27,7 +27,7 @@ Description: GNU version of the tar archiving utility
 Package: tar-scripts
 Architecture: any
 Multi-Arch: foreign
-Depends: ${shlibs:Depends}, ${misc:Depends}, tar
+Depends: ${shlibs:Depends}, ${misc:Depends}
 Conflicts: dump
 Description: optional scripts for GNU version of the tar archiving utility
  This package provides the backup, restore, backup.sh, and dump-remind

debian/tar-scripts.lintian

+tar-scripts: script-with-language-extension usr/sbin/backup.sh