Remove obsolete Fixture.Body references (#16259)

Content.Client/Weapons/Ranged/Systems/FlyBySoundSystem.cs

@@ -26,8 +26,8 @@ public sealed class FlyBySoundSystem : SharedFlyBySoundSystem
 
         // If it's not our ent or we shot it.
         if (attachedEnt == null ||
-            args.OtherFixture.Body.Owner != attachedEnt ||
-            TryComp<ProjectileComponent>(args.OurFixture.Body.Owner, out var projectile) &&
+            args.OtherEntity != attachedEnt ||
+            TryComp<ProjectileComponent>(uid, out var projectile) &&
             projectile.Shooter == attachedEnt)
         {
             return;