Auto select the single tournament for ETEAM

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

participation/forms.py

@@ -75,6 +75,12 @@ class ParticipationForm(forms.ModelForm):
     """
     Form to update the problem of a team participation.
     """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if settings.TFJM_APP == "ETEAM":
+            # One single tournament only
+            del self.fields['tournament']
+
     class Meta:
         model = Participation
         fields = ('tournament', 'final',)