Remove unnecessary stuff

biscuit/core/dashboard/README.md

biscuit/core/dashboard/caches.py

biscuit/core/dashboard/management/commands/refresh_caches.py

biscuit/core/dashboard/migrations/0001_initial.py

biscuit/core/dashboard/migrations/0002_cache.py

biscuit/core/dashboard/migrations/0002_notification_read.py

...core/dashboard/migrations/0003_cache_last_time_updated.py

biscuit/core/dashboard/migrations/0004_cache_site_cache.py

biscuit/core/dashboard/migrations/0005_cache_needed_until.py

...uit/core/dashboard/migrations/0006_merge_20191118_1939.py

biscuit/core/dashboard/models.py

biscuit/core/dashboard/plan_caches.py

biscuit/core/dashboard/templates/dashboard/tools.html

biscuit/core/dashboard/urls.py

biscuit/core/dashboard/views/tools.py

biscuit/core/static/common/helper.js

biscuit/core/static/common/style.css

biscuit/core/static/js/dashboard.js

biscuit/core/static/js/rebus.js