Drop old models and connected stuff

aleksis/apps/alsijil/actions.py

aleksis/apps/alsijil/data_checks.py

aleksis/apps/alsijil/filters.py

aleksis/apps/alsijil/forms.py

aleksis/apps/alsijil/managers.py

aleksis/apps/alsijil/model_extensions.py

aleksis/apps/alsijil/models.py

aleksis/apps/alsijil/tables.py

aleksis/apps/alsijil/tasks.py

aleksis/apps/alsijil/util/alsijil_helpers.py

aleksis/apps/alsijil/util/predicates.py

aleksis/apps/alsijil/views.py