test: coverage fix

packages/pinball_components/lib/src/components/baseboard.dart

@@ -17,9 +17,6 @@ class Baseboard extends BodyComponent with InitialPosition {
     required BoardSide side,
   }) : _side = side;
 
-  /// The size of the [Baseboard].
-  static final size = Vector2(24.79, 15.5);
-
   /// Whether the [Baseboard] is on the left or right side of the board.
   final BoardSide _side;
 

packages/pinball_components/sandbox/lib/stories/baseboard/basic.dart

@@ -14,9 +14,9 @@ class BasicBaseboardGame extends BasicGame {
     final center = screenToWorld(camera.viewport.canvasSize! / 2);
 
     final leftBaseboard = Baseboard(side: BoardSide.left)
-      ..initialPosition = center - Vector2(Baseboard.size.x, 0);
+      ..initialPosition = center - Vector2(25, 0);
     final rightBaseboard = Baseboard(side: BoardSide.right)
-      ..initialPosition = center + Vector2(Baseboard.size.x, 0);
+      ..initialPosition = center + Vector2(25, 0);
 
     await addAll([
       leftBaseboard,