Remove unneeded robots.txt.

diff --git a/docs/3.4/robots.txt b/docs/3.4/robots.txt
deleted file mode 100755 (executable)
index ab49395..0000000
--- a/docs/3.4/robots.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-# www.robotstxt.org/
-
-# Allow crawling of all content
-User-agent: *
-Disallow:
-Sitemap: https://getbootstrap.com/sitemap.xml