libceph: change from BUG to WARN for __remove_osd() asserts

No reason to use BUG_ON for osd request list assertions.

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index decc3b7..6f16428 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1007,8 +1007,8 @@
 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
 {
 	dout("__remove_osd %p\n", osd);
-	BUG_ON(!list_empty(&osd->o_requests));
-	BUG_ON(!list_empty(&osd->o_linger_requests));
+	WARN_ON(!list_empty(&osd->o_requests));
+	WARN_ON(!list_empty(&osd->o_linger_requests));
 
 	rb_erase(&osd->o_node, &osdc->osds);
 	list_del_init(&osd->o_osd_lru);