Revert "REFACTOR: support booting discourse with DISCOURSE_NO_CONSTANTS"

This reverts commit c0b277d273.

app/assets/javascripts/main_include_admin.js

@@ -1,12 +1,6 @@
 //= require_tree ./ember-addons
 //= require admin/models/user-field
 //= require admin/models/site-setting
-//= require admin/models/screened-ip-address
-//= require admin/models/api-key
-//= require admin/models/tl3-requirements
-//= require admin/models/admin-user
-//= require_tree ./admin/models
-//= require admin/routes/admin-email-logs
 //= require admin/controllers/admin-email-skipped
 //= require discourse/lib/export-result
 //= require_tree ./admin