Knowing they cheated, the only realistic options they had with the cadence data was to (a) doctor it or (b) remove it. Why serve it up if it's so damning?
He posted images to Facebook that proved he'd already sync'd the data to TomTom site. They could only be removed from there by manual deletion, and if Skins had told him not to touch the data, he'd be in far more legal problems if he did. This way, he just looks like a total fraud, rather than being a total fraud that's being sued by his sponsor.