The doop_source method does not generate any /binary/ undo items,
where the package name starts with "-". This fact allows us to remove
a branch in the undo code. This also happens to be fortunate because
the call to "inst_tester.remove_testing_binary" in that branch happens
to be wrong.
Signed-off-by: Niels Thykier <niels@thykier.net>
As a side effect, remove mips64el from NEW_ARCHES as we no longer need
that as a work around.
Closes: Debian/britney2#12
Signed-off-by: Niels Thykier <niels@thykier.net>