Update atom.xml metadata.
diff --git a/source/blog/atom.xml b/source/blog/atom.xml
index 6f167b3..8df06c8 100644
--- a/source/blog/atom.xml
+++ b/source/blog/atom.xml
@@ -1,5 +1,4 @@
 ---
-layout: nil
 exclude_from_search: true
 ---
 <?xml version="1.0" encoding="utf-8"?>