Using Jira Announcement Banner for Disabling "Log Work" button
<script>
setTimeout(function() {
if (AJS) {
AJS.$("#wp-ts-add-worklog").hide()
AJS.$("#announcement-banner").hide();
}
}, 100);
</script>
<script>
setTimeout(function() {
if (AJS) {
AJS.$("#wp-ts-add-worklog").hide()
AJS.$("#announcement-banner").hide();
}
}, 100);
</script>