Remove unneeded debug

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>
Fix crash when getting out of android based charging mode

Usb_moded tries to unload the module, and when it fails it by-passes
some safety checks in the logic and ends up crashing. Improving module
clean up also to avoid future occurrences.

[usb-moded] Fix crash when getting out of android based charging mode
Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>