Issue #2358409 by tien.xuan.vo, Haza: image_image field element is processed 2 times

core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php

@@ -127,8 +127,6 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
     $element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
 
-    // Add all extra functionality provided by the image widget.
-    $element['#process'][] = array(get_class($this), 'process');
     // Add properties needed by process() method.
     $element['#preview_image_style'] = $this->getSetting('preview_image_style');
     $element['#title_field'] = $field_settings['title_field'];