message: [XLA] Clean up dangling HLO ops after multi-output fusion.
diff: @@ -128,6 +128,8 @@ HloInstruction* MultiOutputFusion::Fuse(HloInstruction* instr1,
  remaining->MergeFusionInstructionIntoMultiOutput(fused);
  } else {
  remaining->FuseInstructionIntoMultiOutput(fused);
  + CHECK_EQ(0, fused->user_count());
  + TF_CHECK_OK(computation()->RemoveInstruction(fused));
  }
  return remaining;
  }
  