support/testing: remove unused import from sample_python_crossbar

Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/testing/tests/package/sample_python_crossbar.py

@@ -1,4 +1,3 @@
-import os
 import crossbar
 
 crossbar.run(["version"])