Family Guy actor Mike Henry is stepping down from voicing the African-American character of Cleveland Brown to make way for a person of colour.Henry, who is white, originated the role back when the hit cartoon debuted in 1999, and also brought Brown to life on the spin-off series, The Cleveland Show, which ended after a four-season run in 2013. However, Henry has since announced he will no longer voice the part of Brown in the long-running Seth MacFarlane sitcom.