unnecessary to string methods removed

smash/web/models/study_columns.py

@@ -77,9 +77,3 @@ class StudyColumns(models.Model):
                                         default=True,
                                         verbose_name='Resign reason'
                                         )
-
-    def __str__(self):
-        return "%s" % self.study
-
-    def __unicode__(self):
-        return "%s" % self.study

smash/web/models/study_subject_list.py

@@ -42,9 +42,3 @@ class StudySubjectList(models.Model):
                             null=True,
                             blank=True
                             )
-
-    def __str__(self):
-        return "%s %s" % (self.type, self.study)
-
-    def __unicode__(self):
-        return "%s %s" % (self.type, self.study)