code: protected boolean removeEntry(Entry e) {
      int hc = extractModifiedHash(e);
      boolean _removed;
      OptimisticLock l = hash.getSegmentLock(hc);
      long _stamp = l.writeLock();
      try {
        _removed = hash.removeWithinLock(e, hc);
        e.setGone();
        if (_removed) {
          eviction.submitWithoutEviction(e);
        }
      } finally {
        l.unlockWrite(_stamp);
      }
      checkForHashCodeChange(e);
      timing.cancelExpiryTimer(e);
      return _removed;
    }
docs: Remove the entry from the hash and the replacement list.
  There is a race condition to catch: The eviction may run
  in a parallel thread and may have already selected this
  entry.