When an app is removed from the Shopify admin, its external JavaScript files, CSS snippets, and webhook listeners frequently remain embedded in theme.liquid, slowing down your store indefinitely. Here is how to clean your codebase:
1. Search layout/theme.liquid for Deleted App Names
Audit theme.liquid for orphaned {% render %} and <script src=...> tags from apps you no longer use.
2. Delete Unused Snippet Files in snippets/
Open Theme Code > Snippets and remove residual Liquid files from uninstalled currency converters, countdown timers, and review apps.
3. Verify Google PageSpeed Mobile Performance Recovery
Benchmark your mobile score using PageSpeed Insights before and after removing residual scripts.