The CountedDrainEvent event was used to keep track of objects that required additional simulation to drain. It was removed as a part of the great drain rewrite, but the declaration remained. Change-Id: I767a3213669040d3f27e2afafa2e4a5bb997e325 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>