These functions were introduced in commit 3d14c5d2 ("ceph: factor
out libceph from Ceph file system"). Howover, there's no user of
these functions since then, so remove them for simplicity.
Signed-off-by: NYaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: NYan, Zheng <zyan@redhat.com>