ceph: remove unused variable

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 8065dc9..92f4821 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -505,7 +505,6 @@
 	struct ceph_osd_op *op;
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	unsigned wrote;
-	loff_t offset = req->r_pages[0]->index << PAGE_CACHE_SHIFT;
 	struct page *page;
 	int i;
 	struct ceph_snap_context *snapc = req->r_snapc;