message: Don't wait for last PoW block to start PoS staking
  This is unnecessary. It would seem that this affects coin supply, but PoS blocks get same reward as PoW
diff: @@ -774,13 +774,6 @@ void ThreadStakeMiner(CWallet *pwallet)
  continue;
  }
  }
  -
  -
  - //check the next block height, wait for PoS
  - if (chainActive.Tip()->nHeight < Params().GetConsensus().nLastPOWBlock) {
  - MilliSleep(60000);
  - continue;
  - }
  }
  //
  