When adding a meta box to a page in WordPress, you might want to disable the default editor. Simply drop this snippet in your theme’s functions.php file to disable the editor for a specific page template.

Before pasting this code in your function.php file, edit line 11 and replace contact.php by the name of the page you want to disable the editor for.

 add_action( 'admin_init', 'hide_editor' );  function hide_editor() { 	// Get the Post ID. 	$post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'] ; 	if( !isset( $post_id ) ) return;  	// Get the name of the Page Template file. 	$template_file = get_post_meta($post_id, '_wp_page_template', true);          if($template_file == 'contact.php'){ // edit the template name     	remove_post_type_support('page', 'editor');     } }

Credit: Snipplr.