docs: private final boolean remove(ExpirableReference expirableRef, boolean expired)
      {
          boolean reply = expiryIndex.remove();
  
          if (reply)
          {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) SibTr.debug(tc,"Removed ("+ (expired ? "expired" : "gone")+ ")"+ " ET="+ expirableRef.getExpiryTime()+ " objId="+ expirableRef.getID());
          }
          else
          {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) SibTr.debug(tc, "Unable to remove from index: " + " ET=" + expirableRef.getExpiryTime() + " objId=" + expirableRef.getID());
          }
          return reply;
      }