message: Remove unused CTxIndex declaration
diff: @@ -2204,7 +2204,6 @@ bool CTransaction::CheckAnonInputAB(CTxDB &txdb, const CTxIn &txin, int i, int n
  CPubKey pkRingCoin;
  CAnonOutput ao;
  - CTxIndex txindex;
  ec_point pSigC;
  pSigC.resize(EC_SECRET_SIZE);
  @@ -2336,7 +2335,6 @@ bool CTransaction::CheckAnonInputs(CTxDB& txdb, int64_t& nSumValue, bool& fInval
  CPubKey pkRingCoin;
  CAnonOutput ao;
  - CTxIndex txindex;
  const unsigned char* pPubkeys = &s[2];
  const unsigned char* pSigc = &s[2 + EC_COMPRESSED_SIZE * nRingSize];
  const unsigned char* pSigr = &s[2 + (EC_COMPRESSED_SIZE + EC_SECRET_SIZE) * nRingSize];
  