This filter changes the minimum severity of a log message to be reported to Caldera Forms Pro. By default notices or higher are reported. There is also a filter to disable logging.
This filter was added in version 0.11.0
Only Report Warnings And Errors To Caldera Forms Pro Logger
Only Report Errors To Caldera Forms Pro Logger
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.