Merge pull request #7 from rbowen/main

Drops link to 1.3 docs, which are gone.
diff --git a/content/docs/index.md b/content/docs/index.md
index 8a91352..072557a 100644
--- a/content/docs/index.md
+++ b/content/docs/index.md
@@ -15,8 +15,6 @@
 
 -  [Version 2.0](2.0/) (Historical)
 
--  [Version 1.3](1.3/) (Historical)
-
 -  [Trunk](trunk/) (Development / Draft)