If you need to uninstall the app, you can do so by deleting it from your Shopify admin or by removing its code from your theme code files. To learn how to do the latter, follow these steps:
In your Shopify admin, click Online Store.
Go to Themes.
Click the Actions drop-down menu.
Choose Edit code.
Go to theme.liquid.
Scroll down to locate the page speed optimizer file.
Delete the entire line.
Click Save.
