Remove all() from category manager

[stuartmaxwell]

I don't think .all() is required in the following two methods:

    def get_categories(self: "CategoryManager") -> models.QuerySet:
        """Return the queryset for categories.

        If CACHE_CATEGORIES is set to True, we return the cached queryset.
        """
        if djpress_settings.CACHE_CATEGORIES:
            return self._get_cached_categories()

        return self.all()

    def _get_cached_categories(self: "CategoryManager") -> models.QuerySet:
        """Return the cached categories queryset."""
        queryset = cache.get(CATEGORY_CACHE_KEY)

        if queryset is None:
            queryset = self.all()
            cache.set(CATEGORY_CACHE_KEY, queryset, timeout=None)

        return queryset

[stuartmaxwell]

Might be: self.get_queryset() instead. Need to look up which is the better option, or if it matters.