This line is unreachable, remove it.

[akpm@linux-foundation.org: remove unneeded initialisation of `err']
Signed-off-by: NWANG Cong <amwang@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>