Remove old unused stuff (#3241)

.gitignore

.test_durations

docs/getting-started/architecture.md

docs/index.md

docs/setup/administrators/configuration.md

hypha/apply/projects/forms/report.py

hypha/locale/django.pot

hypha/locale/en/LC_MESSAGES/django.po

hypha/public/utils/context_processors.py

hypha/settings/base.py

hypha/settings/django.py

hypha/static_src/src/javascript/tracking.js

hypha/templates/base-apply.html

hypha/templates/base.html

requirements.txt

stellar.yaml