Remove unnecessary initialization for updatingMonthBox.

The boolean variable updatingMonthBox no longer requires explicit initialization to false as it defaults to that value. This change simplifies the code by removing redundant initialization.

gemsfx/src/main/java/com/dlsc/gemsfx/skins/YearMonthViewSkin.java

@@ -30,7 +30,7 @@ public class YearMonthViewSkin extends SkinBase<YearMonthView> {
     private static final PseudoClass CURRENT_MONTH_PSEUDO_CLASS = PseudoClass.getPseudoClass("current");
 
     private final ObjectProperty<Integer> year = new SimpleObjectProperty<>(this, "year");
-    private boolean updatingMonthBox = false;
+    private boolean updatingMonthBox;
 
     public YearMonthViewSkin(YearMonthView control) {
         super(control);