src/robots.txt.ejs: remove blank line comments

Remove comment about blank lines not being allowed. This may have
been true at one point, but recent verification with Google's own
robotstxt tool shows no difference in parsing with or without the
blank lines. Also, the RFC for the Robots Exclusion Protocol does
not mention such a limitation.

See: https://github.com/google/robotstxt
See: https://www.rfc-editor.org/rfc/rfc9309.html

Author: alanorth

src/robots.txt.ejs

@@ -5,7 +5,6 @@ Sitemap: <%= origin %>/sitemap_index.html
 
 ##########################
 # Default Access Group
-# (NOTE: blank lines are not allowable in a group record)
 ##########################
 User-agent: *
 # Disable access to Discovery search and filters; admin pages; processes; submission; workspace; workflow & profile page
@@ -26,11 +25,11 @@ Disallow: /communities/*?spc.page
 # Optionally uncomment the following line ONLY if sitemaps are working
 # and you have verified that your site is being indexed correctly.
 # Disallow: /browse/*
-#
+
 # If you have configured DSpace (Solr-based) Statistics to be publicly
 # accessible, then you may not want this content to be indexed
 # Disallow: /statistics
-#
+
 # You also may wish to disallow access to the following paths, in order
 # to stop web spiders from accessing user-based content
 # Disallow: /contact