Remove unnecessary guard in refresh history callback
Remove unnecessary guard in refresh history callback

The function ajaxForm() rejects the fetch promise when the response is
not a 200, so we can assume that if the code is being executed a 200 was
returned.

In the event a 200 is returned, the requests attribute is always a
JavaScript Array.

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