feat: remove unnecessary type def

Author: joakimunge

packages/flutter_box_transform/lib/src/transformable_box.dart

@@ -143,7 +143,7 @@ class TransformableBox extends StatefulWidget {
   final RectChangeEvent? onChanged;
 
   /// A callback that is called every time the [TransformableBox] is tapped.
-  final TapEvent? onTap;
+  final VoidCallback? onTap;
 
   /// A callback that is called when [TransformableBox] triggers a pointer down
   /// event to begin a drag operation.

packages/flutter_box_transform/lib/src/typedefs.dart

@@ -25,9 +25,6 @@ typedef RectChangeEvent = void Function(
   DragUpdateDetails event,
 );
 
-/// A callback that is called when the box is tapped.
-typedef TapEvent = void Function();
-
 /// A callback that is called when the box begins a drag operation.
 typedef RectDragStartEvent = void Function(
   DragStartDetails event,