crimson: remove unused OpsExecuter::rollback_obc_if_modified overload

Signed-off-by: Samuel Just <[email protected]>

Author: athanatos

src/crimson/osd/ops_executer.h

@@ -548,7 +548,6 @@ OpsExecuter::flush_changes_n_do_ops_effects(
 template <class Func>
 struct OpsExecuter::RollbackHelper {
   void rollback_obc_if_modified();
-  void rollback_obc_if_modified(const std::error_code& e);
   OpsExecuter *ox;
   Func func;
 };
@@ -587,36 +586,6 @@ void OpsExecuter::RollbackHelper<Func>::rollback_obc_if_modified()
   }
 }
 
-template <class Func>
-void OpsExecuter::RollbackHelper<Func>::rollback_obc_if_modified(
-  const std::error_code& e)
-{
-  // Oops, an operation had failed. do_osd_ops() altogether with
-  // OpsExecuter already dropped the ObjectStore::Transaction if
-  // there was any. However, this is not enough to completely
-  // rollback as we gave OpsExecuter the very single copy of `obc`
-  // we maintain and we did it for both reading and writing.
-  // Now all modifications must be reverted.
-  //
-  // The conditional's purpose is to efficiently handle hot errors
-  // which may appear as a result of e.g. CEPH_OSD_OP_CMPXATTR or
-  // CEPH_OSD_OP_OMAP_CMP. These are read-like ops and clients
-  // typically append them before any write. If OpsExecuter hasn't
-  // seen any modifying operation, `obc` is supposed to be kept
-  // unchanged.
-  assert(ox);
-  const auto need_rollback = ox->has_seen_write();
-  crimson::get_logger(ceph_subsys_osd).debug(
-    "{}: object {} got error {}, need_rollback={}",
-    __func__,
-    ox->obc->get_oid(),
-    e,
-    need_rollback);
-  if (need_rollback) {
-    func(ox->obc);
-  }
-}
-
 // PgOpsExecuter -- a class for executing ops targeting a certain PG.
 class PgOpsExecuter {
   template <typename T = void>