Deleting a button

I created a category list for menu Įvykiai and i dont know from where did this button came, And i dont know how to delete it

You can use this custom CSS to hide it:

.category-list .content-category .cat-items form#adminForm {
    display: none;
}

Thanks for you alot 🙂 But i didnt understant why i get this button o_O. But i am very excited for your help 🙂