Remove analytics key from the example config

client/config.example.js

@@ -6,7 +6,7 @@ module.exports = {
   RECAPTCHA_SITE_KEY: '',
 
   // Google analytics tracking ID
-  GOOGLE_ANALYTICS_ID: '6Lc4TUAUAAAAAMRHnlEEt21UkPlOXKCXHaIapdTT',
+  GOOGLE_ANALYTICS_ID: '',
 
   // Contact email address
   CONTACT_EMAIL: '',