Code to Disable Autosave for Classic Editor in WordPress

/* Disable Autosave in Classic Editor */
function wpflt_disable_autosave_classic_editor() {
    wp_deregister_script( 'autosave' );
}
add_action( 'admin_init', 'wpflt_disable_autosave_classic_editor' );

Note: This works only for Classic Editor. Doesn’t work for Block editor. To disable Autosave in Gutenberg, use the Disable Gutenberg Autosave plugin. or use the code mentioned in this article.