refactor(pg): remove unused imports (#2854)

Author: Fdawgs

packages/pg/lib/client.js

@@ -1,7 +1,6 @@
 'use strict'
 
 var EventEmitter = require('events').EventEmitter
-var util = require('util')
 var utils = require('./utils')
 var sasl = require('./sasl')
 var pgPass = require('pgpass')

packages/pg/lib/native/client.js

@@ -3,7 +3,6 @@
 // eslint-disable-next-line
 var Native = require('pg-native')
 var TypeOverrides = require('../type-overrides')
-var pkg = require('../../package.json')
 var EventEmitter = require('events').EventEmitter
 var util = require('util')
 var ConnectionParameters = require('../connection-parameters')