Features auto delete field
As declared in https://www.drupal.org/node/649298#comment-7710069 there won't be any such support in Features module itself. In the same issue, there is also relevant answer in https://www.drupal.org/node/649298#comment-10219951:


  You can instead add a hook_update_N function to a custom module and delete the field with code (see field_delete_field).


This should be used in my_feature.install file. Note that if you go this way, you will probably need to add something like

function my_feature_features_export_files($module_name, $export) {
  if ($module_name == 'my_feature') {
    return array('my_feature.install' =&gt; array('file_path' =&gt; 'sites/all/modules/my_feature/my_feature.install'));
  }
}


to you my_feature.module file. This ensures that my_feature.install file is added to feature on any further export.