CSSTUDIO-2880 Remove "synchronized" from the definition of refresh(),…

… since the function now always runs on the UI thread.

app/logbook/olog/ui/src/main/java/org/phoebus/logbook/olog/ui/LogEntryTableViewController.java

@@ -435,7 +435,7 @@ public String getQuery() {
         return query.getValue().getQuery();
     }
 
-    private synchronized void refresh() {
+    private void refresh() {
         Runnable refreshRunnable = () -> {
             if (this.searchResult != null) {
                 List<TableViewListItem> selectedLogEntries = new ArrayList<>(tableView.getSelectionModel().getSelectedItems());