Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  51087867d7908e19983772e5b3d270c78014129e

Remove initStorer callback

This is no longer needed since none of the browsers we serve JavaScript
to require userData.  IE 8 and up (the lowest IE that gets JavaScript)
support localStorage.

The callback parameter is optional and initStorer already returns
the storage object.

Change-Id: Id55f2ea78576c85d348896c4ee13331f140c3eb4