Fix codestyle violations

Author: EmandM

com.unity.netcode.gameobjects/Tests/Editor/Serialization/BytePackerTests.cs

@@ -844,7 +844,7 @@ public void TestPackingBasicTypes(
             else if (testType == typeof(SceneHandle))
             {
 #if SCENE_MANAGEMENT_SCENE_HANDLE_NO_INT_CONVERSION
-                SceneHandle v = SceneHandle.FromRawData((ulong)random.Next());
+                var v = SceneHandle.FromRawData((ulong)random.Next());
 #else
                 SceneHandle v = random.Next();
 #endif

com.unity.netcode.gameobjects/Tests/Runtime/NetworkObject/NetworkObjectOnSpawnTests.cs

@@ -5,9 +5,7 @@
 using Unity.Netcode.TestHelpers.Runtime;
 using UnityEngine;
 using UnityEngine.TestTools;
-#if SCENE_MANAGEMENT_SCENE_HANDLE_AVAILABLE
 using UnityEngine.SceneManagement;
-#endif
 
 namespace Unity.Netcode.RuntimeTests
 {
@@ -381,7 +379,7 @@ public void DynamicallySpawnedNoSceneOriginException()
             var sceneOriginHandle = networkObject.GetSceneOriginHandle();
 
             // This validates that GetSceneOriginHandle will return the GameObject's scene handle that should be the currently active scene
-            var activeSceneHandle = UnityEngine.SceneManagement.SceneManager.GetActiveScene().handle;
+            var activeSceneHandle = SceneManager.GetActiveScene().handle;
             Assert.IsTrue(sceneOriginHandle == activeSceneHandle, $"{nameof(NetworkObject)} should have returned the active scene handle of {activeSceneHandle} but returned {sceneOriginHandle}");
         }