Remove duplicate array key. props tivnet. fixes #24021.

git-svn-id: http://core.svn.wordpress.org/trunk@23948 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix typo in upgrade_100(). props tivnet, bpetty. fixes #24020.

git-svn-id: http://core.svn.wordpress.org/trunk@23949 1a063a9b-81f0-0310-95a4-ce76da25c4cd