diff --git a/mozilla/string/doc/string-guide.css b/mozilla/string/doc/string-guide.css
deleted file mode 100644
index c9308dc9751..00000000000
--- a/mozilla/string/doc/string-guide.css
+++ /dev/null
@@ -1,118 +0,0 @@
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diff --git a/mozilla/xpcom/string/doc/string-guide.css b/mozilla/xpcom/string/doc/string-guide.css
deleted file mode 100644
index c9308dc9751..00000000000
--- a/mozilla/xpcom/string/doc/string-guide.css
+++ /dev/null
@@ -1,118 +0,0 @@
-/* string-guide.css */
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-body										  { font-family: serif; background-color: white;  }
-strong                    { font-style: italic; }
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-.warning                  { color: red; }
-.notice                   { color: blue; }
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-    font-size:        90%;
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