largefiles: properly sync lfdirstate after removing largefiles The more aggressive synchronization of lfdirstate that was backed out in 1265a3a71d75 masked the problem where lfdirstate would hold an 'R' for a largefile that was added and then removed without a commit between. We could just conditionally call lfdirstate.drop() or lfdirstate.remove() here, but this also properly updates lfdirstate if the standin doesn't exist for the file somehow (i.e. call drop instead of remove). Without this change, the precommit status in the commit command immediately after the test change lists the removed (and never committed) largefile as 'R'. It can also lead to situations where the status command reports the same, long after the commit [1]. [1] http://www.selenic.com/pipermail/mercurial-devel/2015-January/065153.html