How to remove Upload picture lable from registration page?
Something similar to this should work. Use form id alter hook to remove the label from image field.

function yourmodule_form_user_register_alter(&amp;$form, &amp;$form_state) {

 // Search for the field you want to alter 

 // unset the label using $form['search_image_field_name'] or remove the label using empty string for that form field.
}