Removing dead free download link

http://www.lemkesoft.com/xd/public/content/index._cGlkPTM0NA_.html on http://www.openmicroscopy.org/site/support/bio-formats/users/graphic-con/index.html doesn't exist anymore. Removing link to make build stable again. 

Already have link to front page with download link clearly shown so not bothering to replace it.