Remove `layout: nil`.

It throws a warning with the latest Jekyll.
10 years ago · 26652e12ec
2 changed files with 0 additions and 2 deletions
--- a/docs/robots.txt
+++ b/docs/robots.txt
@ -1,5 +1,4 @@
 ---
-layout: nil
 ---

 # www.robotstxt.org/
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
@ -1,5 +1,4 @@
 ---
-layout: nil
 ---

 <?xml version="1.0" encoding="UTF-8"?>