Remove Bluebird.longStackTraces() (#1496)

lib/test-worker.js

@@ -2,7 +2,6 @@
 
 // Check if the test is being run without AVA cli
 {
-	/* eslint-disable import/order */
 	const path = require('path');
 	const chalk = require('chalk');
 
@@ -17,21 +16,17 @@
 	}
 }
 
+const currentlyUnhandled = require('currently-unhandled')();
+const isObj = require('is-obj');
+
 const adapter = require('./process-adapter');
 const globals = require('./globals');
 
 const opts = adapter.opts;
 globals.options = opts;
 
-/* eslint-enable import/order */
-const Bluebird = require('bluebird');
-const currentlyUnhandled = require('currently-unhandled')();
-const isObj = require('is-obj');
 const serializeError = require('./serialize-error');
 
-// Bluebird specific
-Bluebird.longStackTraces();
-
 (opts.require || []).forEach(require);
 
 adapter.installSourceMapSupport();