Revert "Merge pull request ceph#12978 from asheplyakov/jewel-18581"

See: http://tracker.ceph.com/issues/18809

This reverts commit 8e69580, reversing
changes made to c05730c.

Signed-off-by: Samuel Just <sjust@redhat.com>
(cherry picked from commit 0cf7a61)

Conflicts:
	src/osd/ReplicatedPG.h

src/osd/ReplicatedPG.h

@@ -384,33 +384,6 @@ class ReplicatedPG : public PG, public PGBackend::Listener {
     return get_object_context(hoid, true, &attrs);
   }
 
-  bool try_lock_for_read(
-    const hobject_t &hoid,
-    ObcLockManager &manager) override {
-    if (is_missing_object(hoid))
-      return false;
-    auto obc = get_object_context(hoid, false, nullptr);
-    if (!obc)
-      return false;
-    return manager.try_get_read_lock(hoid, obc);
-  }
-
-  void release_locks(ObcLockManager &manager) {
-    release_object_locks(manager);
-  }
-
-  void pgb_set_object_snap_mapping(
-    const hobject_t &soid,
-    const set<snapid_t> &snaps,
-    ObjectStore::Transaction *t) override {
-    return update_object_snap_mapping(t, soid, snaps);
-  }
-  void pgb_clear_object_snap_mapping(
-    const hobject_t &soid,
-    ObjectStore::Transaction *t) override {
-    return clear_object_snap_mapping(t, soid);
-  }
-
   void log_operation(
     const vector<pg_log_entry_t> &logv,
     boost::optional<pg_hit_set_history_t> &hset_history,