When this file was uploaded to Wikimedia Commons, it was available from Picasa Web Albums under the stated license. The Picasa Web Albums user has since stopped distributing the file under this license. Creative Commons licenses cannot be revoked, so the file is still free to use under the terms of the license stated here. See the Creative Commons FAQ on revoking licensing.
From the CC FAQ (permanent link; August 2006):
"Creative Commons licenses are non-revocable. This means that you cannot stop someone, who has obtained your work under a Creative Commons license, from using the work according to that license. You can stop distributing your work under a Creative Commons license at any time you wish; but this will not withdraw any copies of your work that already exist under a Creative Commons license from circulation, be they verbatim copies, copies included in collective works and/or adaptations of your work. So you need to think carefully when choosing a Creative Commons license to make sure that you are happy for people to be using your work consistent with the terms of the license, even if you later stop distributing your work."
This tag places images into Category:Files from Picasa Web Albums.