refactor: removed .fromVector constructor

lib/photo_booth/widgets/photobooth_background.dart

@@ -18,7 +18,7 @@ class PhotoboothBackground extends StatelessWidget {
     return BackgroundAnimation(
       x: avatar.direction.x,
       y: avatar.direction.y,
-      z: avatar.distance,
+      z: 0,
       backgroundSelected: backgroundSelected,
     );
   }

lib/rive/widgets/background_animation.dart

@@ -13,18 +13,6 @@ class BackgroundAnimation extends StatefulWidget {
     required this.backgroundSelected,
   });
 
-  BackgroundAnimation.fromVector3(
-    Vector3 direction, {
-    Key? key,
-    required Background backgroundSelected,
-  }) : this(
-          key: key,
-          x: direction.x,
-          y: direction.y,
-          z: direction.z,
-          backgroundSelected: backgroundSelected,
-        );
-
   final double x;
   final double y;
   final double z;

test/rive/widgets/background_animation_test.dart

@@ -15,8 +15,10 @@ void main() {
           home: StatefulBuilder(
             builder: (context, setState) {
               stateSetter = setState;
-              return BackgroundAnimation.fromVector3(
-                vector3,
+              return BackgroundAnimation(
+                x: vector3.x,
+                y: vector3.y,
+                z: vector3.z,
                 backgroundSelected: background,
               );
             },