If you want to delete automated metatag from drupal (<meta name=”Generator” content=”Drupal 7 (http://drupal.org)” />) then the following code may be useful for you:
Just make a function yourthemename_html_head_alter() under your themes template.php and try the below code:
function yourthemename_html_head_alter(&$head_elements) {
unset($head_elements[‘metatag_generator’]);
}
Instead of that unset($head_elements[‘system_meta_generator’]); can also work but the above code worked for me.
I got metatag_generator array when i print the $head_elements array .So logically we should unset metatag_generator if we want to remove <meta name=”Generator” content=”Drupal 7 (http://drupal.org)” /> .