What should be done to remove the application correctly?

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.

Go to the theme code editing section in the admin panel of your web store.
Online Store → Themes → Actions → Edit code

2. Open the theme.liquid file in the Layout directory.

Find the following code snippets of the theme.liquid file and delete it:

{% render 'spurit_uac_meta_snippet' %}

{% render 'spurit_uac_open_graph_snippet' %}

3. Also remove the following files located in Snippets folder:

spurit_uac_open_graph_snippet.liquid

spurit_uac_meta_snippet.liquid

4. And remove the file from Templates folder:

search.uac.liquid