Use the site's locale for the feed language. Provides the same result as...

Use the site's locale for the feed language. Provides the same result as language_attributes(). Removes the rss_language option. fixes #13440. see #5517.



git-svn-id: https://core.svn.wordpress.org/trunk@19784 1a063a9b-81f0-0310-95a4-ce76da25c4cd