diff --git a/xulmus/locale/en-US/overlay.dtd b/xulmus/locale/en-US/overlay.dtd
deleted file mode 100644
index 9005d9c4..00000000
--- a/xulmus/locale/en-US/overlay.dtd
+++ /dev/null
@@ -1,4 +0,0 @@
-<!ENTITY auditortest1.helloworld.label "Do HelloWorld">
-<!ENTITY auditortest1.helloworld.accesskey "H">
-<!ENTITY auditortest1.pane.label "This is a Display Pane">
-<!ENTITY auditortest1.pane.button "Learn More">
\ No newline at end of file
diff --git a/xulmus/locale/en-US/overlay.properties b/xulmus/locale/en-US/overlay.properties
deleted file mode 100644
index 82aef91d..00000000
--- a/xulmus/locale/en-US/overlay.properties
+++ /dev/null
@@ -1 +0,0 @@
-helloMessage=Hello World!