Red code legacy renderer (#383)

- Remove some references to gEnv->pRenderer/GetIEditor()->GetRenderer() that is now always null.
- Restore the debug console to existence.
- Stop building the following in preparation for their removal:

Code/CryEngine/Cry3DEngine/*
Code/CryEngine/RenderDll/*
Code/Tools/CryFXC/*
Code/Tools/HLSLCrossCompiler/*
Code/Tools/HLSLCrossCompilerMETAL/*
Code/Tools/RC/*
Code/Tools/ShaderCacheGen/*
Tools/CrySCompileServer/*

Code/Sandbox/Editor/RenderViewport.cpp

@@ -275,8 +275,6 @@ void CRenderViewport::resizeEvent(QResizeEvent* event)
 
     gEnv->pSystem->GetISystemEventDispatcher()->OnSystemEvent(ESYSTEM_EVENT_RESIZE, width(), height());
 
-    gEnv->pRenderer->EF_DisableTemporalEffects();
-
     if (AZ::Interface<AzFramework::AtomActiveInterface>::Get())
     {
         // We queue the window resize event because the render overlay may be hidden.