Why coding something custom when Django implements it natively?

apps.py

@@ -7,7 +7,3 @@ from django.core.signals import got_request_exception
 
 class ScriptsConfig(AppConfig):
     name = 'scripts'
-
-    def ready(self):
-        from . import signals
-        got_request_exception.connect(signals.send_mail_on_exception)

signals.py

-# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-import os
-import sys
-
-from django.conf import settings
-from django.core.mail import send_mail
-from django.template.loader import render_to_string
-from django.views.debug import ExceptionReporter
-
-
-def send_mail_on_exception(request, **kwargs):
-    """
-    When an error occurs on the Note Kfet, a mail is automatically sent to the webmasters.
-    """
-
-    if settings.DEBUG:
-        # Don't need to send a mail in debug mode, errors are already displayed in console and in the response view.
-        return
-
-    try:
-        exc_info = sys.exc_info()
-        exc_type = exc_info[0]
-        exc = exc_info[1]
-        tb = exc_info[2]
-        reporter = ExceptionReporter(request=request, exc_type=exc_type, exc_value=exc, tb=tb)
-
-        note_sender = os.getenv("NOTE_MAIL", "notekfet@example.com")
-        webmaster = os.getenv("WEBMASTER_MAIL", "notekfet@example.com")
-
-        message = render_to_string('scripts/mail-error500.txt', context={"error": reporter.get_traceback_text()})
-        message_html = render_to_string('scripts/mail-error500.html', context={"error": reporter.get_traceback_html()})
-
-        send_mail("Erreur dans la Note Kfet", message, note_sender, [webmaster], html_message=message_html)
-    except BaseException as e:
-        sys.stderr.write("Une erreur est survenue lors de l'envoi d'un mail, pour signaler une erreur.")
-        raise e