Resolve "Make exam a many to many field on StudentInfo model"

Closes #233 (closed)

core/models/student_info.py

@@ -99,32 +99,6 @@ class StudentInfo(models.Model):
         exam_info.save()
         self.exams.add(exam_info)
 
-    @classmethod
-    def get_annotated_score_submission_list(cls) -> QuerySet:
-        """Can be used to quickly annotate a user with the necessary
-        information on the overall score of a student and if he does not need
-        any more correction.
-
-        A student is done if
-            * module type was pass_only and student has enough points
-            * every submission got accepted feedback
-
-        Returns
-        -------
-        QuerySet
-            the annotated QuerySet as described above.
-        """
-        return cls.objects.annotate(
-            overall_score=Coalesce(Sum('submissions__feedback__score'),
-                                   Value(0)),
-        ).annotate(
-            done=Case(
-                When(exam__pass_score__lt=F('overall_score'), then=Value(1)),
-                default=Value(0),
-                output_field=BooleanField()
-            )
-        ).order_by('user__username')
-
     def disable(self):
         """The student won't be able to login in anymore, but his current
         session can be continued until s/he logs out.