Linting

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

participation/forms.py

@@ -7,17 +7,15 @@ import re
 from typing import Iterable
 
 from crispy_forms.helper import FormHelper
-from crispy_forms.layout import Div, Submit, Field
+from crispy_forms.layout import Div, Field, Submit
 from django import forms
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.core.validators import FileExtensionValidator
-from django.db.models import CharField, Value
-from django.db.models.functions import Concat
 from django.utils.translation import gettext_lazy as _
 from pypdf import PdfReader
-
 from registration.models import VolunteerRegistration
+
 from .models import Note, Participation, Passage, Pool, Solution, Synthesis, Team, Tournament