Auto remove uber cart product attributes's option
Try to use Commerce Product Attributes module. I haven't use this module. But I hope you will get that you want.


  This module provides some enhancements to the Drupal Commerce
  attribute handling.
  
  The improvement contains:
  
  
  Attribute field for line item
  Edit option for attributes
  


Or

Try this Refer Link also if you will not getting any solution from above module.

Or

You can do this by adding below code to Ubercart Attribute module.

contributions/ubercart/uc_attribute/uc_attribute.module, line 831


uc_attribute_option_delete

function uc_attribute_option_delete($oid) {
  // Delete the class attribute options.
  uc_attribute_subject_option_delete($oid, 'class');

  // Delete the product attribute options (and the adjustments!).
  uc_attribute_subject_option_delete($oid, 'product');

  // Delete base attributes and their options.
  db_delete('uc_attribute_options')
    -&gt;condition('oid', $oid)
    -&gt;execute();

  return SAVED_DELETED;
}