Obsolete composer.json in MW 1.22 RC0 and earlier

From semantic-mediawiki.org

Yeah, right since it is a MW problem and not a SMW problem it should not be added to the instructions. Additionally it only affects alphas, betas and rcs of MW 1.22. However it is good to have it on the talk page here for others to see. The only thing I wonder about is that you need to create a "composer.json" in that very spot for MW 1.22 anyway? I will not be working with MW 1.22 before probably May or June so I currently cannot check for myself.

18:27, 17 January 2014