WordPress at a glance
action is not described

deprecated_file_included action-hook . WP 2.5.0

Fires when a deprecated file is called.

Usage

add_action( 'deprecated_file_included', 'action_function_name_7292', 10, 4 );
function action_function_name_7292( $file, $replacement, $version, $message ){
	// action...
}
$file(string)
The file that was called.
$replacement(string)
The file that should have been included based on ABSPATH.
$version(string)
The version of WordPress that deprecated the file.
$message(string)
A message regarding the change.

Where the hook is called

_deprecated_file()
wp-includes/functions.php 4010
do_action( 'deprecated_file_included', $file, $replacement, $version, $message );

Where the hook is used (in WP core)

Does not used.