Do I need to do anything extra after I delete Abandoned Cart Reminder app?
When you uninstall the application in the Shopify admin panel, the theme will still contain code snippets from the application.
This is typical for all Shopify applications, because after you uninstall the application from your store it no longer has the rights to restore all the previous changes it made to the theme.
Open Themes section on the admin panel of your web store (Online Store → Themes).
Find Theme from the list which will be used with our installed app.
Click Actions → Edit Code.
Find and open theme.liquid file under Layout section.
Remove the following code which starts from the line:
<!-- spurit_acr-added →
and finishes the line
<!-- /spurit_acr-added →
Remove the spurit_acr-theme-snippet.liquid file under Snippets section.
Remove the theme-without-spurit_acr.liquid file under Layout section.