Best practices for reducing unused JS caused by external parties like PayPal?

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Hello everyone,

*Page Speed Insights* keeps telling me that I can save up to 3,35 secs if I reduce unused JS.

The only problem I have is that these scripts are not directly cause by me, but rather by plugins necessary for WooCommerce.

* Paypal
* Facebook
* Google Tag Manager

I am currently using these plugins to speed up stuff

* Asset CleanUp (free)
* WP Fastest Cache (free)
* Jetpack Boost (free)

Can I use one of these to make changes to my unused external Javascripts?
Any other possibility? What would be best practices here?

Thanks

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