Removed unused method

src/main/java/de/thm/arsnova/services/IQuestionService.java

@@ -37,8 +37,6 @@ public interface IQuestionService {
 
 	int getSkillQuestionCount(String sessionkey);
 
-	List<String> getQuestionIds(String sessionKey);
-
 	void deleteQuestion(String questionId);
 
 	void deleteAllQuestions(String sessionKeyword);

src/main/java/de/thm/arsnova/services/QuestionService.java

@@ -120,17 +120,6 @@ public class QuestionService implements IQuestionService {
 		return result;
 	}
 
-	@Override
-	@Authenticated
-	public List<String> getQuestionIds(String sessionKey) {
-		User user = getCurrentUser();
-		Session session = databaseDao.getSessionFromKeyword(sessionKey);
-		if (session == null) {
-			throw new NotFoundException();
-		}
-		return databaseDao.getQuestionIds(session, user);
-	}
-
 	@Override
 	@Authenticated
 	public void deleteQuestion(String questionId) {