Add duration parameter to muting. (#13831)

* Adding duration to muting.

* Remove useless checks

app/workers/delete_mute_worker.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class DeleteMuteWorker
+  include Sidekiq::Worker
+
+  def perform(mute_id)
+    mute = Mute.find_by(id: mute_id)
+    UnmuteService.new.call(mute.account, mute.target_account) if mute&.expired?
+  end
+end