Can plaintiff avoid federal court by waiving damages over $75,000?

Can a nonprofit employee’s wrongful termination lawsuit be remanded to state court when she waives the right to collect damages in excess of the $75,000 minimum amount in controversy necessary to sustain federal court diversity jurisdiction?  A federal District Court for the District of Columbia has held that the waiver precludes the federal court from considering the case that the defendant sought to remove from state court.