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// Hide Editor on Some Pages
add_action( 'admin_init', 'hide_editor' );
function hide_editor() {
  $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'] ;
  if( !isset( $post_id ) ) return;

  $pagesArr=array(
	  '9', // AboutUs
	  '63' // ContactUs
	);
  if(in_array($post_id,$pagesArr)){
    remove_post_type_support('page', 'editor');
  }

}