Initialize chat interface

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

participation/templates/participation/chat.html

@@ -1,13 +0,0 @@
-{% extends "base.html" %}
-
-{% load i18n %}
-
-{% block content %}
-    <div class="alert alert-warning">
-    {% blocktrans trimmed %}
-        The chat feature is now out of usage. If you feel that having a chat
-        feature between participants is important, for example to build a
-        team, please contact us.
-    {% endblocktrans %}
-    </div>
-{% endblock %}

participation/urls.py

@@ -2,7 +2,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from django.urls import path
-from django.views.generic import TemplateView
 
 from .views import CreateTeamView, FinalNotationSheetTemplateView, GSheetNotificationsView, JoinTeamView, \
     MyParticipationDetailView, MyTeamDetailView, NotationSheetsArchiveView, NoteUpdateView, ParticipationDetailView, \
@@ -74,5 +73,4 @@ urlpatterns = [
     path("pools/passages/<int:pk>/update/", PassageUpdateView.as_view(), name="passage_update"),
     path("pools/passages/<int:pk>/solution/", SynthesisUploadView.as_view(), name="upload_synthesis"),
     path("pools/passages/notes/<int:pk>/", NoteUpdateView.as_view(), name="update_notes"),
-    path("chat/", TemplateView.as_view(template_name="participation/chat.html"), name="chat")
 ]