private boolean removeIfPresentEstimate(EstimateMapKey key, LoadEstimateTask task) {
    // no need to cancel task; it already fired
    return estimateMap.remove(key, task);
  }
Remove the task from the estimate map at the given key.

@return true it task was removed; false if it was not the task mapped to key
geode-core/src/main/java/org/apache/geode/distributed/internal/LocatorLoadSnapshot.java