Remove gtk_toolbar_set_show_arrow from setBounds and GTK3 bindings

Address review feedback: also remove the show_arrow toggle from
setBounds, since WRAP is not supported on GTK and the flag was being
misused. With no remaining callers, remove the gtk_toolbar_set_show_arrow
native binding from GTK3.java as well. Remove Snippet395 as it is a
test aid, not a user-facing example.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vogella

bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk3/GTK3.java

@@ -702,11 +702,6 @@ public class GTK3 {
 	 * @param item cast=(GtkToolItem *)
 	 */
 	public static final native void gtk_toolbar_insert(long toolbar, long item, int pos);
-	/**
-	 * @param toolbar cast=(GtkToolbar *)
-	 * @param show_arrow cast=(gboolean)
-	 */
-	public static final native void gtk_toolbar_set_show_arrow(long toolbar, boolean show_arrow);
 	/**
 	 * @param toolbar cast=(GtkToolbar *)
 	 * @param style cast=(GtkToolbarStyle)

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/ToolBar.java

@@ -593,18 +593,8 @@ void reskinChildren (int flags) {
 
 @Override
 int setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
-	if (!GTK.GTK4) GTK3.gtk_toolbar_set_show_arrow (handle, false);
 	int result = super.setBounds (x, y, width, height, move, resize);
 	if ((result & RESIZED) != 0) relayout ();
-	if ((style & SWT.WRAP) != 0) {
-		if (GTK.GTK4) {
-			/* TODO: GTK4 will require us to implement our own
-			 * overflow menu. May require the use of the "toolbar" style class
-			 * applied to the widget.  */
-		} else {
-			GTK3.gtk_toolbar_set_show_arrow (handle, true);
-		}
-	}
 
 	return result;
 }