[ing] Fix transaction label not cleaned up
Fixes a regression from https://git.weboob.org/weboob/devel/commit/bc73ccfef9a6d4a90771b5e1f3b7fafe663cc95b. Labels are not cleaned up anymore and this was resulting in things like this:
{
"type": 6,
"raw": "retrait dab 06/11/2012 rennes laennec",
"label": "dab 06/11/2012 rennes laennec"
}
instead of:
{
"type": 6,
"raw": "retrait dab 06/11/2012 rennes laennec",
"label": "rennes laennec"
}