Deprecated several PHP functions from being available in twig

The following functions have been removed from being available in twig:

-    $functions = array('t', 'attributes', 'drupal_attributes', 'drupal_render', 'render', 'twig_render', 'hide', 'show', 'unset', 'count');

The following functions remain available:

* hide, show, render, unset, url (temporarily)

The following filters are available:

* t

Note: render will be called always automatically when a render object is passed via {{ data.renderarray }} like

{{ content.links }} => calls the equivalent of render($variables['content']['links']);

{{ content }} => calls the equivalent of render($variables['content']);

{{ }} == a print statement in twig