[SPARK-3970] Remove duplicate removal of local dirs

The shutdown hook of `DiskBlockManager` would remove localDirs. So do not need to register them with `Utils.registerShutdownDeleteDir`. It causes duplicate removal of these local dirs and corresponding exceptions.
It seems undesirable to duplicate the delete logic but I can see that stop needs to trigger a delete. What exception happens ? Deleting something that isn't there should not be an erro .