Deletes the header with the passed name. Subsequent requests
will not have the deleted header in its request.
Example:
php
haveHttpHeader('X-Requested-With', 'Codeception');
$I->amOnPage('test-headers.php');
...
$I->deleteHeader('X-Requested-With');
$I->amOnPage('some-other-page.php');
?>
See also:
Codeception\Lib\InnerBrowser::deleteHeader()