Removing named namespace from code base.

Game/game.h

@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #include <Core/Memory/MemoryArena.h>
 
@@ -6,7 +6,7 @@ struct EntityManager;
 
 struct World
 {
-    Juliet::Arena* WorldArena;
+    Arena* WorldArena;
     EntityManager* EntityManager;
 };
 
@@ -19,7 +19,7 @@ enum class GameMode
 
 struct GameState
 {
-    Juliet::Arena* TotalArena;
+    Arena* TotalArena;
 
     World* World;