message: sub useless cerr
diff: @@ -3673,10 +3673,6 @@ Database::insert(const TripleWithObjType* _triples, TYPE_TRIPLE_NUM _triple_num,
  {
  valid_num++;
  }
  - if((i+1)%100 == 0)
  - {
  - cerr<<i<<"-th added. And the valid_num = "<<valid_num<<"\n";
  - }
  }
  #endif
  @@ -4084,10 +4080,6 @@ Database::remove(const TripleWithObjType* _triples, TYPE_TRIPLE_NUM _triple_num,
  {
  valid_num++;
  }
  - if((i+1)%100 == 0)
  - {
  - cerr<<i<<"-th removed. And the valid_num = "<<valid_num<<"\n";
  - }
  }
  #endif
  