no more communication website media

app/controllers/admin/communication/websites_controller.rb

app/models/communication/website/imported/medium.rb

app/models/communication/website/imported/post.rb

app/models/communication/website/imported/website.rb

app/models/communication/website/medium.rb

app/models/concerns/with_github.rb

app/models/research/researcher.rb

app/services/github.rb

app/services/wordpress.rb

app/views/admin/communication/websites/import.html.erb

...rate/20211025124617_remove_communication_website_media.rb

db/schema.rb

test/models/communication/website/imported/medium_test.rb

test/models/communication/website/medium_test.rb