Remove more unused things from CryCommon and CrySystem. (#709)

Lots of unrelated removals, I basically tried to remove everything exposed via gEnv that isn't used anymore, and following the threads found a few other things to remove also.

Code/CryEngine/CryCommon/IRenderer.h

@@ -16,12 +16,12 @@
 #include "Cry_Geo.h"
 #include "Cry_Camera.h"
 #include "ITexture.h"
-#include <IFlares.h> // <> required for Interfuscator
+#include <IFuncVariable.h> // <> required for Interfuscator
+#include <IXml.h> // <> required for Interfuscator
+#include "smartptr.h"
 #include <AzCore/Casting/numeric_cast.h>
 #include <AzCore/std/containers/intrusive_slist.h>
 
-#include "IResourceCompilerHelper.h" //  for IResourceCompilerHelper::ERcCallResult
-
 // forward declarations
 struct SRenderingPassInfo;
 struct SRTStack;
@@ -95,7 +95,6 @@ struct IFFont;
 struct IFFont_RenderProxy;
 struct STextDrawContext;
 struct IRenderMesh;
-class IOpticsManager;
 struct ShadowFrustumMGPUCache;
 struct IAsyncTextureCompileListener;
 struct IClipVolume;
@@ -955,25 +954,6 @@ protected:
     virtual ~ITextureStreamListener() {}
 };
 
-#if defined(CRY_ENABLE_RC_HELPER)
-////////////////////////////////////////////////////////////////////////////
-// Listener for asynchronous texture compilation.
-// Connects the listener to the task-queue of pending compilation requests.
-enum ERcExitCode;
-struct IAsyncTextureCompileListener
-{
-public:
-    virtual void OnCompilationStarted(const char* source, const char* target, int nPending) = 0;
-    virtual void OnCompilationFinished(const char* source, const char* target, IResourceCompilerHelper::ERcCallResult nReturnCode) = 0;
-
-    virtual void OnCompilationQueueTriggered(int nPending) = 0;
-    virtual void OnCompilationQueueDepleted() = 0;
-
-protected:
-    virtual ~IAsyncTextureCompileListener() {}
-};
-#endif
-
 enum eDolbyVisionMode
 {
     eDVM_Disabled,
@@ -1869,8 +1849,6 @@ struct IRenderer
     virtual SDepthTexture* CreateDepthSurface(int nWidth, int nHeight, bool shaderResourceView = false) = 0;
     virtual void DestroyDepthSurface(SDepthTexture* pDepthSurf) = 0;
 
-    virtual IOpticsElementBase* CreateOptics(EFlareType type) const = 0;
-
     // Note:
     //  Used for pausing timer related stuff.
     // Example: