Add MultiplayerEditorGem to clean up logic plus misc. cleanup

Gems/Multiplayer/Code/Source/MultiplayerGem.cpp

@@ -19,10 +19,6 @@
 #include <Source/Pipeline/NetworkSpawnableHolderComponent.h>
 #include <AzNetworking/Framework/NetworkingSystemComponent.h>
 
-#ifdef MULTIPLAYER_EDITOR
-    #include <Source/Editor/MultiplayerEditorSystemComponent.h>
-#endif
-
 namespace Multiplayer
 {
     MultiplayerModule::MultiplayerModule()
@@ -32,9 +28,6 @@ namespace Multiplayer
             AzNetworking::NetworkingSystemComponent::CreateDescriptor(),
             MultiplayerSystemComponent::CreateDescriptor(),
             NetBindComponent::CreateDescriptor(),
-#ifdef MULTIPLAYER_EDITOR
-            MultiplayerEditorSystemComponent::CreateDescriptor(),
-#endif
             NetBindMarkerComponent::CreateDescriptor(),
             NetworkSpawnableHolderComponent::CreateDescriptor(),
         });
@@ -48,11 +41,10 @@ namespace Multiplayer
         {
             azrtti_typeid<AzNetworking::NetworkingSystemComponent>(),
             azrtti_typeid<MultiplayerSystemComponent>(),
-#ifdef MULTIPLAYER_EDITOR
-            azrtti_typeid<MultiplayerEditorSystemComponent>(),
-#endif
         };
     }
 }
 
+#if !defined(MULTIPLAYER_EDITOR)
 AZ_DECLARE_MODULE_CLASS(Gem_Multiplayer, Multiplayer::MultiplayerModule);
+#endif