Because it's part of the Wiki: https://en.wikipedia.org/w/index.php?title=MediaWiki:Robots.txt&action=history https://en.wikipedia.org/w/index.php?title=MediaWi

Because it's part of the Wiki: https://en.wikipedia.org/w/index.php?title=MediaWiki:Robots.txt&action=history https://en.wikipedia.org/w/index.php?title=MediaWiki:Robots....