Removing Unwanted CSS
To find where a specific stylesheet is coming from, scan your Drupal directory for that file's name. This is the easiest way to find it.

To disable a stylesheet, you can either use preprocess hook, or add the following to your theme's .info file:

stylesheets[all][] = css/removed/GOw.css


Just make sure that the file does not exist, and Drupal won't include it.

Hope this helps.