Altere ou oculte o filtro ‘All’ Elementor pro

/* Elementor Portfolio Filter Bar Hacks */

/* Hack 1 - Change or hide the 'All' filter */

/* Hide the Elements visibility */
.elementor-portfolio__filters li:nth-child(1) {
    visibility: hidden;
}

/* Add a different title in place of ALL */
.elementor-portfolio__filters li:nth-child(1):before {
    visibility: visible;
    content: "ChangeMe";
}

Agradecimento e outros hacks: https://gist.github.com/diggeddy/6fd1c6d7f79f148a41c81684383aefd5