To remove End Time of event in Event Summary Block

You can use this code to Website Tools > Code Injection > Footer
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/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>

Result
