Simplify user deactivation

app/controllers/concerns/authorization.rb

@@ -30,8 +30,6 @@ module Authorization
         redirect_to session_menu_url(script_name: nil)
       elsif Current.membership.blank?
         redirect_to session_menu_url(script_name: nil)
-      elsif !Current.user&.active?
-        redirect_to unlink_membership_url(script_name: nil, membership_id: Current.membership.signed_id(purpose: :unlinking))
       end
     end
 

app/models/user.rb

@@ -20,7 +20,10 @@ class User < ApplicationRecord
   delegate :staff?, to: :identity, allow_nil: true
 
   def deactivate
-    accesses.destroy_all
-    update! active: false
+    transaction do
+      accesses.destroy_all
+      membership.destroy!
+      update! active: false
+    end
   end
 end