I'm sure they refurbed in recently, this year or last, seems strange to me that they would remove it. On the other hand black buccaneer at chessington has been down all season, not sure they are the same model but they're both HUSS I think, could they be sacrificing the blade for parts for black buccaneer?
Black Buccaneer is now closed for good and won't be returning to Chessington.
The ride vehicle of The Blade was refurbished this year, as were I believe a few other parts of the ride system. Given it's the busiest time of the year, the decision to perform early maintenance would not have been taken unless absolutely necessary.