librbd: remove unused C_DiffObject::m_request_num

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/librbd/DiffIterate.cc b/src/librbd/DiffIterate.cc
index 9e4bc17fe08ab2fe29968668dad0e5975cf9859f..4305f299b475dbd1185ea06262d5607904c824f8 100644 (file)
--- a/src/librbd/DiffIterate.cc
+++ b/src/librbd/DiffIterate.cc
@@ -113,7 +113,6 @@ private:
   ImageCtx &m_image_ctx;
   librados::IoCtx &m_head_ctx;
   DiffContext &m_diff_context;
-  uint64_t m_request_num;
   std::string m_oid;
   uint64_t m_offset;
   std::vector<ObjectExtent> m_object_extents;