UX: Release new user profile navigation for sidebar compatibility (#20134)

With the introduction of the sidebar navigation menu, the design team at
Discourse redesigned the user profile navigation to better coexist with
the sidebar.

db/migrate/20230202021414_remove_enable_new_user_profile_nav_groups_site_settings.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class RemoveEnableNewUserProfileNavGroupsSiteSettings < ActiveRecord::Migration[7.0]
+  def up
+    execute "DELETE FROM site_settings WHERE name = 'enable_new_user_profile_nav_groups'"
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end