def delete_value(tag_name, tag_value, custom_headers:nil)
      response = delete_value_async(tag_name, tag_value, custom_headers:custom_headers).value!
      nil
    end
def delete_value(tag_name, tag_value, custom_headers:nil)
      response = delete_value_async(tag_name, tag_value, custom_headers:custom_headers).value!
      nil
    end
Delete a subscription resource tag value.

 @param tag_name [String] The name of the tag.
 @param tag_value [String] The value of the tag.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.