Event: Remove End Time

#1. Event Summary Block
You can use this code to Code Injection Footer

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $(".event-time-localized").each(function() {
    console.log($(this).text())
    var currentText = $(this).text();
    var currentTextArr = currentText.split("–")
    if(currentTextArr.length == 2) {
      $(this).text(currentTextArr[0])
    }	
  });
})
</script>

#2. Event List Page
To remove end time in Event List Page

You can use this code to Website Tools > Custom CSS

span.event-datetime-divider, span.event-datetime-divider ~ * {
    display: none !important;
}

#3. Event Detail
To remove end time in Event Detail

You can use this to Custom CSS box

span.event-datetime-divider, span.event-datetime-divider ~ * {
    display: none !important;
}