/* Hide the calendar icon and clock icon in the date times section for Event Espresso 4 */
.ee-event-datetimes-ul .dashicons.dashicons-calendar, .ee-event-datetimes-ul .dashicons.dashicons-clock {display: none;}
You can add new the styling to your child theme's stylesheet or through a plugin like Reaktiv CSS builder or My Custom CSS.
Screenshot of change: http://cl.ly/image/111q3L0Q2P2b
References:
https://eventespresso.com/topic/customizing-the-event-page-2/