Remove extraneous error message during docscheck when searching for unused file type (#5698)

Author: roaks3

scripts/docscheck.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-docs=$(ls website/docs/**/*.markdown website/docs/**/*.md)
+docs=$(ls website/docs/**/*.markdown)
 error=false
 
 for doc in $docs; do