The 26-year-old, who joined the club last summer, featured 40 times in his debut season, but had not been involved with the first-team squad in the new campaign.
A statement on the club's official website read: "Coventry City would like to take the opportunity to wish William all the best in his future career."
It is understood that League Two side Bury are interested in the Frenchman's services.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Sunderland | 9 | 6 | 1 | 2 | 18 | 8 | 10 | 19 |
| 2 | Burnley | 9 | 5 | 3 | 1 | 14 | 4 | 10 | 18 |
| 3 | Leeds UnitedLeeds | 9 | 4 | 4 | 1 | 15 | 7 | 8 | 16 |
| 4 | Sheffield UnitedSheff Utd | 8 | 5 | 3 | 0 | 10 | 3 | 7 | 16 |
| 5 | West Bromwich AlbionWest Brom | 8 | 5 | 1 | 2 | 12 | 6 | 6 | 16 |
| 6 | Norwich CityNorwich | 9 | 4 | 3 | 2 | 16 | 10 | 6 | 15 |
| 7 | Blackburn RoversBlackburn | 8 | 4 | 3 | 1 | 14 | 9 | 5 | 15 |
| 8 | Middlesbrough | 8 | 4 | 2 | 2 | 9 | 5 | 4 | 14 |
| 9 | Watford | 8 | 4 | 1 | 3 | 12 | 13 | -1 | 13 |
| 10 | Oxford UnitedOxford Utd | 9 | 3 | 3 | 3 | 13 | 11 | 2 | 12 |
| 11 | Hull City | 9 | 3 | 3 | 3 | 12 | 13 | -1 | 12 |
| 12 | Swansea CitySwansea | 8 | 3 | 2 | 3 | 8 | 6 | 2 | 11 |
| 13 | Bristol City | 8 | 2 | 4 | 2 | 9 | 13 | -4 | 10 |
| 14 | Derby CountyDerby | 8 | 3 | 0 | 5 | 10 | 12 | -2 | 9 |
| 15 | Stoke CityStoke | 8 | 3 | 0 | 5 | 10 | 12 | -2 | 9 |
| 16 | Preston North EndPreston | 9 | 2 | 3 | 4 | 7 | 12 | -5 | 9 |
| 17 | Millwall | 8 | 2 | 2 | 4 | 12 | 11 | 1 | 8 |
| 18 | Coventry CityCoventry | 8 | 2 | 2 | 4 | 9 | 11 | -2 | 8 |
| 19 | Plymouth ArgylePlymouth | 8 | 2 | 2 | 4 | 8 | 12 | -4 | 8 |
| 20 | Sheffield WednesdaySheff Weds | 8 | 2 | 2 | 4 | 9 | 14 | -5 | 8 |
| 21 | Luton TownLuton | 8 | 2 | 2 | 4 | 8 | 13 | -5 | 8 |
| 22 | Queens Park RangersQPR | 8 | 1 | 4 | 3 | 9 | 14 | -5 | 7 |
| 23 | Portsmouth | 9 | 0 | 5 | 4 | 9 | 20 | -11 | 5 |
| 24 | Cardiff CityCardiff | 8 | 1 | 1 | 6 | 3 | 17 | -14 | 4 |
| > Championship Full Table | |||||||||
