proper fix for dropunused

Now getKeysPresent checks that the key's content, not only its directory,
exists. In direct mode, the inode cache file is used as a standin for the
content.

removeAnnex always removes the inode cache file, and drop and move --from
always call removeAnnex, even if the object does not seem to be inAnnex,
to ensure it's always deleted.

Command/Move.hs

@@ -104,7 +104,7 @@ toPerform dest move key file = moveLock move key $ do
 			Remote.logStatus dest key InfoPresent
 		if move
 			then do
-				whenM (inAnnex key) $ removeAnnex key
+				removeAnnex key
 				next $ Command.Drop.cleanupLocal key
 			else next $ return True