Google announced on official blog about winding down more features:
AdSense for Feeds the freature was designed for publishers to help them to increase their earnings by placing ads on RSS feeds. The feature will be close on the 3rd of December.
Classic Plus is the feature for Google Search that allows people to upload or select images to use a background on Google.com. Google will close the service in November.
Spreadsheet Gadgets the feature was designed for people who want to add customized features to Google Spreadsheets. The service will close next year.
Google News Badges the service will close on October, 15.