test.issue3179: fix: allow test to run in browsers (#8769)

Introduced in e6b8c93, use of require()
silently fails tests in browser environments.  Also `should` is already declared
as a global.

Author: alxndrsn

tests/integration/test.issue3179.js

@@ -1,7 +1,5 @@
 'use strict';
 
-const should = require("chai").should();
-
 var adapters = [
   ['http', 'http'],
   ['http', 'local'],