linting: use-implicit-booleaness-not-comparison

Newer warning from pylint, also consistent with how we do things
elsewhere. Note that this only applies to one file in the tests but
disabling it would be very weird for such a small fix.

test/mod/test_osbuild.py

@@ -207,7 +207,7 @@ class TestDescriptions(unittest.TestCase):
 
         # check an empty input leads to an empty list
         res = manifest.depsolve(store, [])
-        assert res == []
+        assert not res
 
         # the build pipeline should resolve to just itself
         res = manifest.depsolve(store, names(build))
@@ -250,7 +250,7 @@ class TestDescriptions(unittest.TestCase):
         store.have.clear()
         store.have.add(image.id)
         res = manifest.depsolve(store, names(image))
-        assert res == []
+        assert not res
 
         # we have a checkpoint of the stage in the image
         # pipeline with the `dep` dependency, so that