Remove obsolete hashCode/equals for Region

This commit adapt the obsolete equals and hashCode methods for Region to
use the super implementation instead. For the upcoming changes for win32
the current implementation cannot be used anymore because all handles
will be created on demand. As the current implementation is equal in
their behavior to the base behavior for these methods is inherited from
Object.

Author: akoch-yatta

bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/graphics/Region.java

@@ -436,9 +436,7 @@ void destroy() {
  */
 @Override
 public boolean equals(Object object) {
-	if (this == object) return true;
-	if (!(object instanceof Region region)) return false;
-	return handle == region.handle;
+	return super.equals(object);
 }
 
 /**
@@ -511,7 +509,7 @@ long regionToRects(long message, long rgn, long r, long path) {
  */
 @Override
 public int hashCode() {
-	return (int)handle;
+	return super.hashCode();
 }
 
 /**

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Region.java

@@ -310,10 +310,7 @@ void destroy() {
  */
 @Override
 public boolean equals(Object object) {
-	if (this == object) return true;
-	if (!(object instanceof Region)) return false;
-	Region region = (Region)object;
-	return handle == region.handle;
+	return super.equals(object);
 }
 
 /**
@@ -371,7 +368,7 @@ public static Region gtk_new(Device device, long handle) {
  */
 @Override
 public int hashCode() {
-	return (int)handle;
+	return super.hashCode();
 }
 
 /**

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Region.java

@@ -253,10 +253,7 @@ void destroyHandlesExcept(Set<Integer> zoomLevels) {
  */
 @Override
 public boolean equals (Object object) {
-	if (this == object) return true;
-	if (!(object instanceof Region)) return false;
-	Region rgn = (Region)object;
-	return getHandleForInitialZoom() == rgn.getHandleForInitialZoom();
+	return super.equals(object);
 }
 
 /**
@@ -295,7 +292,7 @@ Rectangle getBoundsInPixels() {
  */
 @Override
 public int hashCode () {
-	return (int)getHandleForInitialZoom();
+	return super.hashCode();
 }
 
 /**