Removed _text_sanitize() and safe_value/safe_summary in favor of processed/summary_processed

The helper function text_sanitize() (_text_sanitize() in 7.x) has been removed together with the safe_value and safe_summary properties of text field items.

Instead, the processed and summary_processed (for text with summary field items) can be used, which are computed properties that are always present.

Before

7.x

$summary = _text_sanitize($field_instance, $langcode, $item, 'summary');

8.0-alpha3 and older

$value = text_sanitize($instance['settings']['text_processing'], $node->language()->id, $node->body[0]->getValue(), 'value');

After

8.x

$value = $node->body->processed;
$summary = $node->body->processed_summary;