chore: Clean up PHPStan configuration

[szepeviktor]

All Submissions:

• Have you followed the plugin Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Clean up PHPStan configuration.

[timnolte]

@szepeviktor these changes cause the static analysis checks to fail due to including the Uses func_get_args() check again after it was remove since it never shows up in the code. Also you have made significant changes without much details on why you removed them. My biggest concern was removing %rootDir%/../../php-stubs/wordpress-stubs/wordpress-stubs.php from the bootstrapFiles or is PHPStan able to autoload these?

[szepeviktor]

My biggest concern was removing %rootDir%/../../php-stubs/wordpress-stubs/wordpress-stubs.php from the bootstrapFiles or is PHPStan able to autoload these?

Hello! The package szepeviktor/phpstan-wordpress loads WP core stubs.
https://github.com/szepeviktor/phpstan-wordpress/blob/c9fb3dc5e0a964845f6124a9c4394987749c657b/extension.neon#L93-L95

I may have introduced failures. Fixing now ...

[szepeviktor]

I hope you like 47 lines of deletion :)