message: fix(statics): delete invalid testnet URL
diff: @@ -138,7 +138,7 @@ class BitcoinABC extends BitcoinLikeMainnet {
  class BitcoinABCTestnet extends BitcoinLikeTestnet {
  family = CoinFamily.BCHA;
  - explorerUrl = 'https://api.blockchair.com/bitcoin-abc';
  + explorerUrl = undefined;
  }
  // https://github.com/bitcoin-sv/bitcoin-sv/blob/master/src/validation.cpp
  @@ -150,7 +150,7 @@ class BitcoinSV extends BitcoinLikeMainnet {
  class BitcoinSVTestnet extends BitcoinLikeTestnet {
  family = CoinFamily.BSV;
  - explorerUrl = 'https://testnet.bitcoincloud.net/tx/';
  + explorerUrl = undefined;
  }
  // https://github.com/BTCGPU/BTCGPU/blob/master/src/validation.cpp
  