Remove useless code

Remove backcompat code for WP 5.2, all projects starts with the new version.

Author: Rahe

functions.php

@@ -11,14 +11,3 @@
 	// Boot the service, at after_setup_theme.
 	\BEA\Theme\Framework\Framework::get_container()->boot_services();
 } );
-
-/**
- * Handle wp_body_open new function from WP 5.2
- * @see https://make.wordpress.org/themes/2019/03/29/addition-of-new-wp_body_open-hook/
- * @see https://make.wordpress.org/core/2019/04/24/miscellaneous-developer-updates-in-5-2/
- */
-if ( ! function_exists( 'wp_body_open' ) ) {
-	function wp_body_open() {
-		do_action( 'wp_body_open' );
-	}
-}