How to Remove Message Types in Mailbox

Hello, I want to remove/edit Message Types in Mailbox, can someone help

My first priority is to remove "greeting" type (highlighted).

Help should be appriciated.

Thanks

I'd like to remove it as well. Let me know if you find an answer on this.

/templates/base/   
mail_box_top_section.html

<div class="top_settings_block">
    <div class="left_section">
        __messages_types_list__
    </div>
    <div class="right_section">
        __per_page_block__
    </div>
    <div class="clear_both"></div>
</div>

remove whats in red & clear cache

Perfect! Thanks prolaznik!