[FIX] composer: Remove unwanted "components" dir, which is created by robloach/component-installer (triggered by afarkas/html5shiv) and there doesn't seem to be any way of preventing it as far as i can see (hopefully addresses wish5323)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52678 b456876b-0849-0410-b77d-98878d47e9d5