remove unnecessary duplicated method

service/src/main/java/repositories/TasksRepository.java

@@ -140,12 +140,6 @@ public class TasksRepository implements Repository
         return encodedHash;
     }
 
-    private Optional<Task> getTaskByLevel(Integer level)
-    {
-        return getAll().stream()
-                .filter(task -> task.getLevel() == level)
-                .findFirst();
-    }
 
     private Optional<Task> findTaskByUserFlag(String username, String flagValue)
     {
@@ -153,7 +147,7 @@ public class TasksRepository implements Repository
                 .stream()
                 .filter(flagsMapEntry -> flagsMapEntry.getKey().contains(flagValue))
                 .map(Map.Entry::getValue)
-                .map(level -> getTaskByLevel(level).get())
+                .map(this::get)
                 .findFirst();
     }