Remove "crispy forms" integration (#8684)

* Remove "crispy forms" integration

- No longer doing any back-end form rendering

* Remove django-formtools package

* Fix comment in settings.py

---------

Co-authored-by: Matthias Mair <code@mjmair.com>

src/backend/requirements.in

@@ -6,12 +6,10 @@ django-allauth[openid,saml]               # SSO for external providers via OpenI
 django-allauth-2fa                      # MFA / 2FA
 django-cleanup                          # Automated deletion of old / unused uploaded files
 django-cors-headers                     # CORS headers extension for DRF
-django-crispy-forms<2.0                 # Form helpers # FIXED 2023-02-18 due to required updates in the new version
 django-dbbackup                         # Backup / restore of database and media files
 django-error-report-2                   # Error report viewer for the admin interface
 django-filter                           # Extended filtering options
 django-flags                            # Feature flags
-django-formtools                        # Form wizard tools
 django-ical                             # iCal export for calendar views
 django-import-export<4.0                # Data import / export for admin interface  # FIXED 2024-06-26 see https://github.com/inventree/InvenTree/pull/7521
 django-maintenance-mode                 # Shut down application while reloading etc.