test: Remove unused imports in test-helpers

Author: sehrope

packages/pg/test/test-helper.js

@@ -1,15 +1,12 @@
 'use strict'
 // make assert a global...
 global.assert = require('assert')
-var EventEmitter = require('events').EventEmitter
 var sys = require('util')
 
 var BufferList = require('./buffer-list')
 const Suite = require('./suite')
 const args = require('./cli')
 
-var Connection = require('./../lib/connection')
-
 global.Client = require('./../lib').Client
 
 process.on('uncaughtException', function (d) {