code: public void removeExpectedAnswer(String realm) {
          if (answers != null) {
              answers.remove(realm);
          }
  
          try {
              if (isAnswersFilled()) {
                  resendRequest();
              }
          } catch (Throwable t) {
              logger.error("removeExpectedAnswer failed with exception: " + t.getLocalizedMessage(), t);
          }
      }
docs: Removes an expected challenge answer from collection.
  
  @param realm Realm of the answer to remove.