Refactored grading summary to fit previous existing files.

app.py

@@ -10,8 +10,7 @@ from helper.firebase_helper import *
 from helper.heygen_api import create_videos_and_save_to_db
 from helper.speech_to_text_helper import *
 from helper.token_counter import count_tokens
-from helper.openai_interface import make_openai_call, make_openai_instruct_call
-from grading_summary.grading_summary import calculate_grading_summary
+from helper.openai_interface import *
 import os
 import re
 import logging