sample_CardConnectionDecorator.py: fix pylint warning

W: 30, 0: Unused CardConnection imported from smartcard.CardConnection
(unused-import)

Author: LudovicRousseau

smartcard/Examples/framework/sample_CardConnectionDecorator.py

@@ -27,7 +27,6 @@
 from smartcard.CardType import AnyCardType
 from smartcard.CardRequest import CardRequest
 from smartcard.CardConnectionObserver import ConsoleCardConnectionObserver
-from smartcard.CardConnection import CardConnection
 from smartcard.CardConnectionDecorator import CardConnectionDecorator
 from smartcard.util import toHexString