cgroup: kill unused variable

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

-1
-1
kernel/cgroup.c
··· 2402 2402 static int proc_cgroupstats_show(struct seq_file *m, void *v) 2403 2403 { 2404 2404 int i; 2405 - struct cgroupfs_root *root; 2406 2405 2407 2406 seq_puts(m, "#subsys_name\thierarchy\tnum_cgroups\n"); 2408 2407 mutex_lock(&cgroup_mutex);