Supprime des fichiers et imports inutiles (#6589)

* Supprime un fichier inutile
* Supprime des imports inutiles dans goals.py
* Supprime des imports inutiles dans validations_opinions.py

zds/tutorialv2/views/goals.py

@@ -14,17 +14,15 @@
     BooleanField,
     HiddenInput,
 )
-from django.http import JsonResponse, HttpResponse
+from django.http import JsonResponse
 from django.shortcuts import get_object_or_404
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
-from django.views import View
-from django.views.generic import TemplateView
 from django.views.generic.edit import BaseFormView
 
 from zds.tutorialv2 import signals
 from zds.tutorialv2.mixins import SingleContentFormViewMixin
-from zds.tutorialv2.models.database import PublishableContent, PublishedContent
+from zds.tutorialv2.models.database import PublishableContent
 from zds.tutorialv2.models.goals import Goal
 from zds.utils import get_current_user
 from zds.utils.paginator import ZdSPagingListView

zds/tutorialv2/views/validations_opinions.py

@@ -1,10 +1,8 @@
 import json
 from datetime import datetime
 
-from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
-from django.contrib.auth.models import User
 from django.core.exceptions import PermissionDenied
 from django.db.models import F
 from django.http import Http404, HttpResponse