This message comes from ResourceLoader.php. In the file history , using git blame , you can see that the code was written by Roan Cattuu (RK) in this change set . From the comment on the change:
Make load.php the output of a comment explaining what happens when the modules are not requested and do not output anything. Max made me do it because he hates blank pages
So, your answer is that because Max hates blank pages, and if you want to know more, you should ask Roan. I guess this is debugging help; instead of looking at a blank page, wondering why it's blank, at least you know that you did something that caused the module loader to request nothing to load ...
As @svick notes, there is a link to a code review , including a discussion of whether to mention Max for everything. Mention of Max was considered as an opportunity to partially close MediaWiki Error 20281 , which states that Easter Eggs are not enough in MediaWiki.
And why open source public repositories of software are cool: D
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