refactor: removed unecessary InitialPosition

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

@@ -16,7 +16,6 @@ class LaunchRamp extends Blueprint {
   LaunchRamp()
       : super(
           components: [
-            // TODO(alestiago): Is it using initialPosition?
             _LaunchRampBase(),
             _LaunchRampForegroundRailing(),
             _LaunchRampExit()..initialPosition = Vector2(0.6, -34),
@@ -28,7 +27,7 @@ class LaunchRamp extends Blueprint {
 /// {@template launch_ramp_base}
 /// Ramp the [Ball] is launched from at the beginning of each ball life.
 /// {@endtemplate}
-class _LaunchRampBase extends BodyComponent with InitialPosition, Layered {
+class _LaunchRampBase extends BodyComponent with Layered {
   /// {@macro launch_ramp_base}
   _LaunchRampBase()
       : super(
@@ -103,12 +102,7 @@ class _LaunchRampBase extends BodyComponent with InitialPosition, Layered {
 
   @override
   Body createBody() {
-    final bodyDef = BodyDef(
+    final body = world.createBody(BodyDef());
-      position: initialPosition,
-      userData: this,
-    );
-
-    final body = world.createBody(bodyDef);
     _createFixtureDefs().forEach(body.createFixture);
 
     return body;
@@ -157,7 +151,7 @@ class _LaunchRampBackgroundRailingSpriteComponent extends SpriteComponent
 /// Foreground railing for the [_LaunchRampBase] to render in front of the
 /// [Ball].
 /// {@endtemplate}
-class _LaunchRampForegroundRailing extends BodyComponent with InitialPosition {
+class _LaunchRampForegroundRailing extends BodyComponent {
   /// {@macro launch_ramp_foreground_railing}
   _LaunchRampForegroundRailing()
       : super(
@@ -200,11 +194,7 @@ class _LaunchRampForegroundRailing extends BodyComponent with InitialPosition {
 
   @override
   Body createBody() {
-    final bodyDef = BodyDef()
+    final body = world.createBody(BodyDef());
-      ..userData = this
-      ..position = initialPosition;
-
-    final body = world.createBody(bodyDef);
     _createFixtureDefs().forEach(body.createFixture);
 
     return body;

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

@@ -14,7 +14,6 @@ class SpaceshipRail extends Blueprint {
   SpaceshipRail()
       : super(
           components: [
-            // TODO(alestiago): Investigate if it's using initial position.
             _SpaceshipRailRamp(),
             _SpaceshipRailExit(),
             _SpaceshipRailBase(radius: 0.55)
@@ -26,8 +25,7 @@ class SpaceshipRail extends Blueprint {
         );
 }
 
-/// Represents the spaceship drop rail from the [Spaceship].
+class _SpaceshipRailRamp extends BodyComponent with Layered {
-class _SpaceshipRailRamp extends BodyComponent with InitialPosition, Layered {
   _SpaceshipRailRamp()
       : super(
           priority: RenderPriority.spaceshipRail,
@@ -112,14 +110,8 @@ class _SpaceshipRailRamp extends BodyComponent with InitialPosition, Layered {
 
   @override
   Body createBody() {
-    final bodyDef = BodyDef(
+    final body = world.createBody(BodyDef());
-      position: initialPosition,
-      userData: this,
-    );
-
-    final body = world.createBody(bodyDef);
     _createFixtureDefs().forEach(body.createFixture);
-
     return body;
   }
 
@@ -180,7 +172,6 @@ class _SpaceshipRailBase extends BodyComponent with InitialPosition {
     final fixtureDef = FixtureDef(shape);
     final bodyDef = BodyDef(
       position: initialPosition,
-      userData: this,
     );
 
     return world.createBody(bodyDef)..createFixture(fixtureDef);