test: remove unused https imports

PR-URL: #1049
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Shigeki Ohtsu <ohtsu@iij.ad.jp>

Author: jbergstroem

test/parallel/test-http-url.parse-post.js

@@ -1,7 +1,6 @@
 var common = require('../common');
 var assert = require('assert');
 var http = require('http');
-var https = require('https');
 var url = require('url');
 
 var testURL = url.parse('http://localhost:' + common.PORT + '/asdf?qwer=zxcv');

test/parallel/test-http-url.parse-search.js

@@ -1,7 +1,6 @@
 var common = require('../common');
 var assert = require('assert');
 var http = require('http');
-var https = require('https');
 var url = require('url');
 
 var testURL = url.parse('http://localhost:' + common.PORT + '/asdf?qwer=zxcv');