Support for compressed files was removed in tuf v0.10.x leaving behind
some vestiges like the test logic in test_repository_lib, which is
duplicated below and carries a redundant comment, and setting compression
on in generate_project_data.py
Signed-off-by: Joshua Lock <jlock@vmware.com>
The generate_repository_data script works in the exact same way as the
generate script and it generates a fresh batch of pre-signed metadata to
test the load_project function.