FIX: Remove strict-dynamic-specific logic from CSP extensions (#25725)

This data is cached, so we don't want to include any site-specific-logic in there. Let's just keep the old URL-collecting behaviour, and let it be stripped out by `CSP::Builder` at runtime.

lib/content_security_policy/extension.rb

@@ -56,7 +56,6 @@ class ContentSecurityPolicy
         ThemeModifierHelper.new(theme_ids: theme_ids).csp_extensions,
       )
 
-      if !SiteSetting.content_security_policy_strict_dynamic
       html_fields =
         ThemeField.where(
           theme_id: theme_ids,
@@ -89,7 +88,6 @@ class ContentSecurityPolicy
         end
 
       extensions << auto_script_src_extension
-      end
 
       extensions
     end