Remove a term from a linear expression.
|void||remove (||int||i )|
Remove the term stored at index
i of the expression.
i: The index of the term to be removed.
|boolean||remove (||GRBVar||var )|
Remove all terms associated with variable
var from the expression.
var: The variable whose term should be removed.
Returns true if the variable appeared in the linear expression (and was removed).