Reuters: French media group Vivendi has pushed out Rodolphe Belmer as chief of its Canal Plus unit amid disappointment over what one source said was a failure to rejuvenate the pay-TV channel and halt a drop in sales and profits. The move came amid a high-profile controversy over the fate of channel’s long-running satirical puppet show “Les Guignols” but the source said it had nothing to do with Belmer’s ousting.