message: Remove last check for missing signature
  This code can never be triggered. The check for missing
  signature already happens further upstream.  Furthermore, any
  transactions with missing inputs will be caught by the condition
  just prior where we are throwing "Transactions do not double spend
  each other "
diff: @@ -159,8 +159,6 @@ DoubleSpendProof DoubleSpendProof::create(const CTransaction &t1, const CTransac
  if (answer.m_prevOutIndex == -1)
  throw std::runtime_error("Transactions do not double spend each other");
  - if (s1.pushData.front().empty() || s2.pushData.front().empty())
  - throw std::runtime_error("Transactions not using known payment type. Could not find sig");
  s1.txVersion = t1.nVersion;
  s2.txVersion = t2.nVersion;
  