Keira Knightley has revealed she’s sold the beloved French vineyard where she married musician James Righton, admitting it was ‘difficult’ to keep their passion project going. The Love Actually star, 40, opened up this week about letting go of the property – previously valued at £3 million – as she reflected on the realities of trying to run a hands-on, organic wine operation with Klaxons keyboardist James, 42, who she married in 2013. ‘I have written about wine, and I’ve written about food just because I like eating it –…