Update order-watcher to use new migrations functions

packages/order-watcher/test/global_hooks.ts

@@ -1,16 +1,6 @@
-import { devConstants } from '@0xproject/dev-utils';
-import { runMigrationsAsync } from '@0xproject/migrations';
-
-import { provider } from './utils/web3_wrapper';
-
-before('migrate contracts', async function(): Promise<void> {
+before('set up mocha', async function(): Promise<void> {
     // HACK: Since the migrations take longer then our global mocha timeout limit
     // we manually increase it for this before hook.
     const mochaTestTimeoutMs = 25000;
     this.timeout(mochaTestTimeoutMs); // tslint:disable-line:no-invalid-this
-    const txDefaults = {
-        gas: devConstants.GAS_LIMIT,
-        from: devConstants.TESTRPC_FIRST_ADDRESS,
-    };
-    await runMigrationsAsync(provider, txDefaults);
 });