From: Herton R. Krzesinski on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1922#note_1043...
@prarit I was about to merge this, but just noticed:
```
redhat/self-test/data/create-data.sh:makefile_vars=$(unset SINGLE_TARBALL;
make dist-dump-variables | grep "=" | cut -d"=" -f1)
```
There is still SINGLE_TARBALL present in create-data.sh script, remove it
there as well?