Remove a single term from a column.
|void||remove (||int||i )|
Remove the term stored at index i of the column.
i: The index of the term to be removed.
|boolean||remove (||GRBConstr||constr )|
Remove the term associated with constraint constr from the column.
constr: The constraint whose term should be removed.
Returns true if the constraint appeared in the column (and was removed).