diff --git a/AppKit/Resources/CPAttachedWindow/attached-window-button-close-highlighted.png b/AppKit/Resources/CPAttachedWindow/attached-window-button-close-highlighted.png
deleted file mode 100644
index 61a9f456e..000000000
Binary files a/AppKit/Resources/CPAttachedWindow/attached-window-button-close-highlighted.png and /dev/null differ
diff --git a/AppKit/Resources/CPAttachedWindow/attached-window-button-close.png b/AppKit/Resources/CPAttachedWindow/attached-window-button-close.png
deleted file mode 100644
index cd8743de1..000000000
Binary files a/AppKit/Resources/CPAttachedWindow/attached-window-button-close.png and /dev/null differ