Remove Hestia footer link

Our file is that: wp-content/themes/hestia/inc/views/main/class-hestia-footer.php

Find this: public function bottom_footer_content

Update $hestia_general_credits variable like that:

$hestia_general_credits = get_theme_mod(
    'hestia_general_credits',
    sprintf(
        /* translators: %1$s is Theme Name, %2$s is WordPress */
        esc_html__( '%2$s', 'Nixarsoft' ),
        esc_html__( 'Nixarsoft', 'Nixarsoft' ),
        /* translators: %1$s is URL, %2$s is WordPress */
        sprintf(
            '<a href="%1$s" target="_blank">%2$s</a>',
            esc_url( __( 'https://nixarsoft.com', 'nixarsoft' ) ),
           'Nixarsoft'
        )
    )
);

Have a nice day.