WordPress at a glance
action is not described

delete_plugin action-hook . WP 4.4.0

Fires immediately before a plugin deletion attempt.

Usage

add_action( 'delete_plugin', 'action_function_name_5765' );
function action_function_name_5765( $plugin_file ){
	// action...
}
$plugin_file(string)
Plugin file name.

Where the hook is called

delete_plugins()
wp-admin/includes/plugin.php 853
do_action( 'delete_plugin', $plugin_file );

Where the hook is used (in WP core)

Does not used.