Make fields not required. Necessary for lesson cancellation. Closes #30.

biscuit/apps/chronos/forms.py

@@ -25,9 +25,3 @@ class LessonSubstitutionForm(forms.ModelForm):
     class Meta:
         model = LessonSubstitution
         fields = ['week', 'lesson_period', 'subject', 'teachers', 'room', 'cancelled']
-
-    def __init__(self, *args, **kwargs):
-        super(My_Form, self).__init__(*args, **kwargs)
-        self.fields['subject'].required = False
-        self.fields['teachers'].required = False
-        self.fields['room'].requiered = False