silverstripe/silverstripe-subsites — pull request #154 by halkyon (2014-08-17 23:22:38+00:00)
Title: Removing unused permission SUBSITE_ASSETS_CREATE_SUBSITE

This isn't used, according to the description it would limit the list
of subsites you can choose to apply a File/Folder to. However, this
dropdown is shown to the user based on whether they have access to
that subsite, so this unused permission code isn't needed.