A statement from the club declared the striker had been "released from his contract by mutual consent".
The 31-year-old netted four goals in his first seven games for United following his move from Huddersfield but failed to add to that tally.
However, all but two of his 14 appearances this season have come off the bench and the player has moved on as the club prepare to reduce their wage bill in the summer.
Source: PA
Source: PA