diff --git a/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters.rake b/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters.rake
deleted file mode 100644
index 6ddb56443..000000000
--- a/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters.rake
+++ /dev/null
@@ -1,25 +0,0 @@
-namespace :after_party do
-  desc 'Deployment task: remove_migration_status_on_filters'
-  task remove_migration_status_on_filters: :environment do
-    rake_puts "Running deploy task 'remove_migration_status_on_filters'"
-
-    # In a9a4f6e2a801b19b127aae8eaec0d1f384b1a53a, a task to migrate ProcedurePresentation's filters
-    # was added.
-    # This task added a "migrated: true" key to all migrated filters.
-    #
-    # Now that this task has run, we can safely remove the extra key.
-
-    procedure_presentations = ProcedurePresentation.where("filters -> 'migrated' IS NOT NULL")
-    progress = ProgressReport.new(procedure_presentations.count)
-
-    procedure_presentations.find_each do |pp|
-      pp.filters.delete('migrated')
-      pp.save!
-      progress.inc
-    end
-    progress.finish
-
-    AfterParty::TaskRecord
-      .create version: AfterParty::TaskRecorder.new(__FILE__).timestamp
-  end
-end
diff --git a/lib/tasks/task_helper.rb b/lib/tasks/task_helper.rb
index 8323773d7..ef6a0bd95 100644
--- a/lib/tasks/task_helper.rb
+++ b/lib/tasks/task_helper.rb
@@ -15,17 +15,6 @@ def rake_print(*args)
   end
 end
 
-# Display progress of a long-running Rake task.
-#
-# Usage:
-#
-# ```
-# progress = ProgressReport.new(100)
-# (0..100).times do
-#   progress.inc
-# end
-# progress.finish
-# ````
 class ProgressReport
   def initialize(total)
     @start = Time.zone.now
diff --git a/spec/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters_spec.rb b/spec/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters_spec.rb
deleted file mode 100644
index e57f7a2d9..000000000
--- a/spec/lib/tasks/deployment/20210720133539_remove_migration_status_on_filters_spec.rb
+++ /dev/null
@@ -1,45 +0,0 @@
-describe '20201001161931_migrate_filters_to_use_stable_id' do
-  let(:rake_task) { Rake::Task['after_party:remove_migration_status_on_filters'] }
-
-  let(:procedure) { create(:simple_procedure) }
-  let(:instructeur_1) { create(:instructeur) }
-  let(:instructeur_2) { create(:instructeur) }
-
-  let(:assign_to_1) { create(:assign_to, procedure: procedure, instructeur: instructeur_1) }
-  let(:assign_to_2) { create(:assign_to, procedure: procedure, instructeur: instructeur_2) }
-
-  let(:procedure_presentation_with_migration) { create(:procedure_presentation, assign_to: assign_to_1, filters: filters.merge('migrated': true)) }
-  let(:procedure_presentation_without_migration) { create(:procedure_presentation, assign_to: assign_to_2, filters: filters) }
-
-  let(:filters) do
-    { "suivis" => [{ "table" => "user", "column" => "email", "value" => "test@example.com" }] }
-  end
-
-  before do
-    procedure_presentation_with_migration
-    procedure_presentation_without_migration
-
-    rake_task.invoke
-
-    procedure_presentation_with_migration.reload
-    procedure_presentation_without_migration.reload
-  end
-
-  after { rake_task.reenable }
-
-  context 'when the procedure presentation has a "migrated" key' do
-    it 'removes the "migrated" key' do
-      expect(procedure_presentation_with_migration.filters).not_to have_key('migrated')
-    end
-
-    it 'leaves other keys unchanged' do
-      expect(procedure_presentation_with_migration.filters['suivis']).to be_present
-    end
-  end
-
-  context 'when the procedure presentation doesn’t have a "migrated" key' do
-    it 'leaves keys unchanged' do
-      expect(procedure_presentation_without_migration.filters['suivis']).to be_present
-    end
-  end
-end