Fix ABI error message

packages/0x.js/src/order_watcher/order_state_watcher.ts

@@ -25,7 +25,6 @@ import { TokenWrapper } from '../contract_wrappers/token_wrapper';
 import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
 import { OrderFilledCancelledLazyStore } from '../stores/order_filled_cancelled_lazy_store';
 import {
-    BlockParamLiteral,
     ContractEventArgs,
     ExchangeContractErrs,
     LogEvent,

packages/abi-gen/src/index.ts

@@ -106,7 +106,9 @@ for (const abiFileName of abiFileNames) {
     }
     if (_.isUndefined(ABI)) {
         utils.log(`${chalk.red(`ABI not found in ${abiFileName}.`)}`);
-        utils.log(`Please make sure your ABI file is either an array with ABI entries or an object with the abi key`);
+        utils.log(
+            `Please make sure your ABI file is either an array with ABI entries or a truffle artifact or 0x deployer artifact`,
+        );
         process.exit(1);
     }