* In `wp_handle_upload()` and `wp_handle_sideload()`, `$ext` gets conditionally reset... and then is never used.
* In `request_filesystem_credentials()`, `$password` is initialized as an empty string. The variable is never used.
See #27882.
Built from https://develop.svn.wordpress.org/trunk@28268
git-svn-id: http://core.svn.wordpress.org/trunk@28096 1a063a9b-81f0-0310-95a4-ce76da25c4cd