diff --git a/api/urls.py b/api/urls.py
new file mode 100644
index 0000000..e69de29
diff --git a/courses/serializers.py b/courses/serializers.py
index e8c19e7..c05f2ee 100644
--- a/courses/serializers.py
+++ b/courses/serializers.py
@@ -21,20 +21,6 @@ class LessonSerializer(serializers.ModelSerializer):
         return self.on_comment == 'N' or self.on_comment == 'T' and self.theme.on_comment
 
 
-class HomeworkSerializer(serializers.ModelSerializer):
-
-    class Meta:
-        model = Homework
-        fields = '__all__'
-
-
-class ExamSerializer(serializers.ModelSerializer):
-
-    class Meta:
-        model = Exam
-        fields = '__all__'
-
-
 class ThemeSerializer(serializers.ModelSerializer):
 
     class Meta: