This removes the LEEME.Debian README file from the docs
directory. We don't even have an English README here as
we usually refer to the wiki for installation instructions.
It makes sense to remove it from the codebase.
To test:
* Verify that the file is removed
* Verify that all references to the file have been removed as well
Example: git grep LEEME
Signed-off-by: David Nind <david@davidnind.com> Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org> Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>