Revert "Merge pull request #6142 from tchak/enable_brouillon_extend_conservation"

This reverts commit 48eb4d9778, reversing
changes made to 5539d5cb8c.

# Conflicts:
#	app/models/dossier.rb
#	db/schema.rb

lib/tasks/deployment/20210429172327_rename_conservation_extension.rake

@@ -1,16 +0,0 @@
-namespace :after_party do
-  desc 'Deployment task: rename_conservation_extension'
-  task rename_conservation_extension: :environment do
-    puts "Running deploy task 'rename_conservation_extension'"
-
-    dossiers = Dossier.state_en_construction.where.not(en_construction_conservation_extension: 0.days)
-    dossiers.find_each do |dossier|
-      dossier.update_column(:conservation_extension, dossier.en_construction_conservation_extension)
-    end
-
-    # Update task as completed.  If you remove the line below, the task will
-    # run with every deploy (or every time you call after_party:run).
-    AfterParty::TaskRecord
-      .create version: AfterParty::TaskRecorder.new(__FILE__).timestamp
-  end
-end