C++ Implementation GameInstance save, also some cleanup of unsued C++ classes

This literally took me days, as it turn out that the timing offset between C++ and BP Init of GameIstance caused it to not be added as a GlobalObject to SPUD correctly.

VIRTUOS_ExpansionPluginTests/Source/VRExpPluginExample/Public/CodeOnlyFunctionLibrary.h

@@ -1,16 +0,0 @@
-#pragma once
-
-#include "CoreMinimal.h"
-#include "Kismet/BlueprintFunctionLibrary.h"
-#include "CodeOnlyFunctionLibrary.generated.h"
-
-UCLASS()
-class NO_API UCodeOnlyFunctionLibrary : public UBlueprintFunctionLibrary
-{
-    GENERATED_BODY()
-
-public:
-
-    UFUNCTION(BlueprintCallable, Category="Utilities|Actor")
-    static FString RenameActorUnique(AActor* ActorToRename, const FString& DesiredName, AActor* ReferenceActorForLevel);
-};

VIRTUOS_ExpansionPluginTests/Source/VRExpPluginExample/Public/CustomAdvancedFriendsGI.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "AdvancedFriendsGameInstance.h"
+#include "CustomAdvancedFriendsGI.generated.h"
+
+/**
+ * Custom GameInstance that registers itself with SPUD for persistence.
+ */
+UCLASS()
+class VREXPPLUGINEXAMPLE_API UCustomAdvancedFriendsGI : public UAdvancedFriendsGameInstance
+{
+    GENERATED_BODY()
+
+public:
+    virtual void Init() override;
+};

VIRTUOS_ExpansionPluginTests/Source/VRExpPluginExample/Public/WidgetHelper.h

@@ -1,15 +0,0 @@
-// Fill out your copyright notice in the Description page of Project Settings.
-
-#pragma once
-
-#include "CoreMinimal.h"
-
-/**
- * 
- */
-class VREXPPLUGINEXAMPLE_API WidgetHelper
-{
-public:
-	WidgetHelper();
-	~WidgetHelper();
-};