This filter was added in Caldera Forms 1.5.0
Avoiding Caldera Forms Conflicts With Optimization Plugins
Using Caldera Forms And Autoptimize
Using Caldera Forms and WP Rocket
If you are using WP Rocket with Caldera Forms, it should work fine. Please make sure to set your cache time to 10 hours or less. If you are using WP Rocket’s script optimization, it should ignore Caldera Forms’ minified scripts. If you wish to use WP Rocket to optimize script loading, use this filter to disable Caldera Forms’ optimization first.
Where Does This Code Go?
When using WordPress hooks to customize Caldera Forms or other plugins you should not modify the plugin files, or you will lose your changes when you update the plugin. Instead you should create a small plugin to hold the custom code. It's easy, learn how here.
Technically you can add the custom code to your theme's functions.php, but then you will not be able to change your theme and keep these customizations.