message: Remove the getting of orphan hashes from the creation of a graphene
  request.
  Graphene requests don't need orphan pool hashes.
diff: @@ -443,14 +443,9 @@ bool CRequestManager::RequestBlock(CNode *pfrom, CInv obj)
  {
  AddGrapheneBlockInFlight(pfrom, inv2.hash);
  + // Instead of building a bloom filter here as we would for an xthin, we actually
  + // just need to fill in CMempoolInfo
  inv2.type = MSG_GRAPHENEBLOCK;
  - std::vector<uint256> vOrphanHashes;
  - {
  - LOCK(orphanpool.cs);
  - for (auto &mi : orphanpool.mapOrphanTransactions)
  - vOrphanHashes.emplace_back(mi.first);
  - }
  - // Instead of building a bloom filter here, we actually just need to fill in CMempoolInfo
  CMemPoolInfo receiverMemPoolInfo = GetGrapheneMempoolInfo();
  ss << inv2;
  ss << receiverMemPoolInfo;
  @@ -472,13 +467,9 @@ bool CRequestManager::RequestBlock(CNode *pfrom, CInv obj)
  {
  AddGrapheneBlockInFlight(pfrom, inv2.hash);
  + // Instead of building a bloom filter here as we would for an xthin, we actually
  + // just need to fill in CMempoolInfo
  inv2.type = MSG_GRAPHENEBLOCK;
  - std::vector<uint256> vOrphanHashes;
  - {
  - LOCK(orphanpool.cs);
  - for (auto &mi : orphanpool.mapOrphanTransactions)
  - vOrphanHashes.emplace_back(mi.first);
  - }
  ss << inv2;
  ss << GetGrapheneMempoolInfo();
  pfrom->PushMessage(NetMsgType::GET_GRAPHENE, ss);
  