Back Office Modification Prestashop 1.6

[Gfinfo web]

So My client has a little bit of a clumsy fingers.

I am trying to remove the "remove voucher" button on orders:

I technacly I found the tpl in:

admin>themes>default>template>controllers>orders>helpers>view>view.tpl

I just need to comment a piece of the code. But no matter what i do it has no effect. I can break teh page if i comment certain logics in the file. But nothing else seems to have an effect.

I just need to comment this code and make it stick:

<a href="{$current_index}&amp;submitDeleteVoucher&amp;id_order_cart_rule={$discount['id_order_cart_rule']}&amp;id_order={$order->id}&amp;token={$smarty.get.token|escape:'html':'UTF-8'}">
														<i class="icon-minus-sign"></i>
														{l s='Delete voucher'}
													</a>

I have disabled the cache, and forced to recompile. 

Anyone have an idea how to fix it?

Thank you for your time.

[Prestashop Addict]

Just add a html comment

<!--
<a href="{$current_index}&amp;submitDeleteVoucher&amp;id_order_cart_rule={$discount['id_order_cart_rule']}&amp;id_order={$order->id}&amp;token={$smarty.get.token|escape:'html':'UTF-8'}">
														<i class="icon-minus-sign"></i>
														{l s='Delete voucher'}
													</a>
-->

 

[Gfinfo web]

Thank you for your time.

I found there was a module overriding the tpl in another place, so changing this indeed did nothing to the back office.