if you use Prestashop 1.7.6.1, you will need to do it the following way:
Affected Files: templates/YOURTEMPLATE/customer/_partials/customer-form.tpl
Original:
{block "form_fields"}
{foreach from=$formFields item="field"}
{block "form_field"}
{form_field field=$field}
{/block}
{/foreach}
{$hook_create_account_form nofilter}
{/block}
Customized:
{block "form_fields"}
{foreach from=$formFields item="field"}
{if $field.name=='siret' || $field['name'] == 'company'}
{continue}
{else}
{block "form_field"}
{form_field field=$field}
{/block}
{/if}
{/foreach}
{$hook_create_account_form nofilter}
{/block}
I hope it does help you guys.