procfs: remove unused variable

In NOMMU configurations, we get a warning about a variable that has become
unused:

fs/proc/task_nommu.c: In function 'nommu_vma_show':
fs/proc/task_nommu.c:148:28: error: unused variable 'priv' [-Werror=unused-variable]

Link: http://lkml.kernel.org/r/[e-mail]
Fixes: 1240ea0dc3bb ("fs, proc: remove priv argument from is_stack")
Signed-off-by: Arnd Bergmann <[e-mail]>
Acked-by: Michal Hocko <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/proc/task_nommu.c

···
 			  int is_pid)
 {
 	struct mm_struct *mm = vma->vm_mm;
-	struct proc_maps_private *priv = m->private;
 	unsigned long ino = 0;
 	struct file *file;
 	dev_t dev = 0;