Drop opinionated settings for PWA
- Base URLs are set to / in PWA's default settings anyway
- With https://github.com/silviolleite/django-pwa/pull/32 merged, the defaults will work under all circumstances without changing settings
- l10n/i18n assumptions should not be made. PWA will see another MR to enabled it to use the language settings used in Django
Closes #140 (closed).