Remove the detached-dentry counter from shrink_dcache_for_umount_subtree() as
the value it computes is no longer used as of commit
312d3ca856d369bb04d0443846b85b4cdde6fa8a which made the nr_dentry counters
summed per-CPU rather than global atomic.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 
 static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
 {
        struct dentry *parent;
-       unsigned detached = 0;
 
        BUG_ON(!IS_ROOT(dentry));
 
                                spin_unlock(&parent->d_lock);
                        }
 
-                       detached++;
-
                        inode = dentry->d_inode;
                        if (inode) {
                                dentry->d_inode = NULL;