PrestaShop 1.6.x. How to remove contact form fields (i.e. Order Reference)

1. Connect to server via FTP or open cPanel File Manager and go to the themes/themeXXX/ directory. Open the contact-form.tpl file (or download it in order to edit it on your computer): 
2. Remove the Order reference field: 
3. In the contact-form.tpl file, find the order reference text using Ctrl+ F hotkey: 
4. You will find the order reference occurrence in this piece of code (on line 80 approximately):

You need to remove the piece of code that is wrapped with the {if}{/if} statement:

Save the changes, re-upload the file back to your server and refresh your website: 
Remove the Attach File field. In the contact-form.tpl file, find the attach file text using Ctrl+ F hotkey: 

You will find the attach file occurrence in this piece of code (on line 98 approximately):

You need to remove the piece of code that is wrapped with the {if}{/if} statement:

Save the changes, re-upload the file back to your server and refresh your website: 

Hopefully, this tutorial was helpful for you.