message: Remove minimalChainWork and defaultAssumeValid for new testnet
diff: @@ -265,10 +265,10 @@ public:
  consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1493596800; // May 1st 2017
  // The best chain should have at least this much work.
  - consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000002830dab7f76dbb7d63");
  + consensus.nMinimumChainWork = uint256S("0x00");
  // By default assume that the signatures in ancestors of this block are valid.
  - consensus.defaultAssumeValid = uint256S("0x0000000002e9e7b00e1f6dc5123a04aad68dd0f0968d8c7aa45f6640795c37b1"); //1135275
  + consensus.defaultAssumeValid = uint256S("0x00");
  pchMessageStart[0] = 0xe2;
  pchMessageStart[1] = 0x48;
  