diff --git a/lib/tasks/once_off/add_gds_editor_permission.rake b/lib/tasks/once_off/add_gds_editor_permission.rake
deleted file mode 100644
index 00a38c4a2..000000000
--- a/lib/tasks/once_off/add_gds_editor_permission.rake
+++ /dev/null
@@ -1,13 +0,0 @@
-namespace :once_off do
-  desc "Update all GDS Users with Imminence signin permission to give them GDS Editor permission"
-  task add_gds_editor_permission: :environment do
-    imminence = Doorkeeper::Application.find_by(name: "Imminence")
-    imminence_signin = imminence.supported_permissions.find_by(name: "signin")
-    imminence_gds_editor = imminence.supported_permissions.find_or_create_by!(name: "GDS Editor", delegatable: false, grantable_from_ui: true, default: false)
-
-    Organisation.where(slug: "government-digital-service").first.users.with_permission(imminence_signin).each do |user|
-      user.supported_permissions << imminence_gds_editor
-      user.save!
-    end
-  end
-end