x-judge: Will Cheryl quit The X Factor to focus on her music?

By DAVID DERBYSHIRE Good to go: Cheryl Cole leaving The X Factor studio after Sunday's live sing-off. But is she planning on leaving the show for good?Cheryl Cole is on the verge of quitting The X Factor after this series to concentrate on her music career, it is thought.The 27-year-old, who has come under attack from fans and finalists this series, is on the brink of launching her pop career in