After messing around a lot with this (since the old tricks seems not to work in recent versions of Elementor) – I disabled default icon sets like eicons and Font awesome by editing /wp-content/plugins/elementor/includes/frontend.php
just disable these lines:
wp_register_style(
'font-awesome',
$this->get_css_assets_url( 'font-awesome', 'assets/lib/font-awesome/css/' ),
[],
'4.7.0'
);
wp_register_style(
'elementor-icons',
$this->get_css_assets_url( 'elementor-icons', 'assets/lib/eicons/css/' ),
[],
'5.3.0'
);