Clean the code to pass pyflakes checks
Clean the code to pass pyflakes checks

Remove unused imports and variables
due to pyflakes complains in order to be able
to reenable it in the stardard build process

Change-Id: Ia2d26c15ffb15ce3d4c112d2cbf2bafe105fe0de
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader,oVirt/ovirt-image-uploader