Remove “Published On” inside wp-admin

You could hide it for non-admins with CSS:

function hide_curtime_wpse_96106() {
    if(get_post_type() === "post"){
        if(!current_user_can('manage_options')){
            // only for non-admins
            echo "<style>.misc-pub-section.curtime {display:none !important;} </style>";
        }
    }
}

Before:

After: