message: remove ledger specifer from txn history req
diff: @@ -316,10 +316,6 @@ class DefaultXRPClient implements XRPClientDecorator {
  const request = this.networkClient.GetAccountTransactionHistoryRequest()
  request.setAccount(account)
  - const ledger = new LedgerSpecifier()
  - ledger.setShortcut(LedgerSpecifier.Shortcut.SHORTCUT_VALIDATED)
  - request.setLedgerSpecifier(ledger)
  -
  const transactionHistory = await this.networkClient.getTransactionHistory(
  request,
  )
  