Remove I3DEngine CryCommon Interface (#567)

Delete:

- I3DEngine
- Missions
- Time of day
- GameEffectsSystem Gem
- ImageProcessing Gem
- SVOGI Gem
- Various other things that don't do anything now that the legacy renderer has been removed.

Code/CryEngine/CrySystem/SystemInit.cpp

@@ -86,7 +86,6 @@
 
 #endif //WIN32
 
-#include <I3DEngine.h>
 #include <IRenderer.h>
 #include <AzCore/IO/FileIO.h>
 #include <IMovieSystem.h>
@@ -107,7 +106,6 @@
 #include "PhysRenderer.h"
 #include "LocalizedStringManager.h"
 #include "SystemEventDispatcher.h"
-#include "Statistics/LocalMemoryUsage.h"
 #include "ThreadConfigManager.h"
 #include "Validator.h"
 #include "ServerThrottle.h"
@@ -768,11 +766,6 @@ static void LoadDetectedSpec(ICVar* pVar)
 
     GetISystem()->SetConfigSpec(static_cast<ESystemConfigSpec>(spec), platform, false);
 
-    if (gEnv->p3DEngine)
-    {
-        gEnv->p3DEngine->GetMaterialManager()->RefreshMaterialRuntime();
-    }
-
     no_recursive = false;
 }
 
@@ -2788,12 +2781,6 @@ AZ_POP_DISABLE_WARNING
             m_env.pRenderer->TryFlush();
         }
 
-#if !defined(RELEASE)
-        m_env.pLocalMemoryUsage = new CLocalMemoryUsage();
-#else
-        m_env.pLocalMemoryUsage = nullptr;
-#endif
-
         if (g_cvars.sys_float_exceptions > 0)
         {
             if (g_cvars.sys_float_exceptions == 3 && gEnv->IsEditor()) // Turn off float exceptions in editor if sys_float_exceptions = 3