ceph-object-corpus: prune old types from decode tests

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/ceph-object-corpus b/ceph-object-corpus
index 71fb1a5dffccc7e66db88491d2bdc7d4d0d6eb0e..d46059573e154273a2941a7f228c6aa3dba00798 160000 (submodule)
--- a/ceph-object-corpus
+++ b/ceph-object-corpus
@@ -1 +1 @@
-Subproject commit 71fb1a5dffccc7e66db88491d2bdc7d4d0d6eb0e
+Subproject commit d46059573e154273a2941a7f228c6aa3dba00798