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/* 
By Default Wordpress tries to add a link to the Attachment Page every time you add media in the WYSIWYG editor; This will set the default option to no link
*/

function wpb_imagelink_setup() {
  $image_set = get_option( 'image_default_link_type' );
  if ($image_set !== 'none') {
    update_option('image_default_link_type', 'none');
  }
}
add_action('admin_init', 'wpb_imagelink_setup', 10);