Remove obsolete compatibility code
Remove obsolete compatibility code

inspect.Traceback has existed since Python 2.6.

spookylukey/django-debug-toolbar,spookylukey/django-debug-toolbar,tim-schilling/django-debug-toolbar,jazzband/django-debug-toolbar,tim-schilling/django-debug-toolbar,tim-schilling/django-debug-toolbar,jazzband/django-debug-toolbar,spookylukey/django-debug-toolbar,jazzband/django-debug-toolbar