Enable email_login_token for all gestionnaires

lib/tasks/2018_11_08_activate_trusted_device_for_a-f.rake

@@ -1,8 +0,0 @@
-namespace :'activate_trusted_device_for_a-f' do
-  task run: :environment do
-    letters_a_to_f = ('a'..'f').to_a
-    Gestionnaire
-      .where("substr(email, 1, 1) IN (?)", letters_a_to_f)
-      .update_all(features: { "enable_email_login_token" => true })
-  end
-end