WP: Remove WordPress Version the right way.

functions.php

<?php
/**
 * Remove WP Version.
 *
 * @since 1.0.0
 */
if ( ! function_exists( 'aa_remove_wp_version' ) ) {
	// Add filter to the_generator.
	add_filter( 'the_generator', 'aa_remove_wp_version' );

	/**
	 * aa_remove_wp_version function.
	 *
	 * Remove the WP version
	 *
	 * @return emtpy string
	 * @author Ahmad Awais
	 * @since  1.0.0
	 */
	function aa_remove_wp_version() {
		return '';
	}
}