Remove (almost) all references to pRenderer (#651)

Remove all references to pRenderer, except from the DebugDraw and LyShine Gems that are still being updated.

Code/Sandbox/Editor/CryEdit.h

@@ -229,7 +229,6 @@ public:
     void OnFileResaveSlices();
     void OnFileEditEditorini();
     void OnPreferences();
-    void OnReloadTextures();
     void OnRedo();
     void OnUpdateRedo(QAction* action);
     void OnUpdateUndo(QAction* action);
@@ -284,12 +283,6 @@ private:
     //! Test mode is a special mode enabled when Editor ran with /test command line.
     //! In this mode editor starts up, but exit immediately after all initialization.
     bool m_bTestMode = false;
-    bool m_bPrecacheShaderList = false;
-    bool m_bPrecacheShaders = false;
-    bool m_bPrecacheShadersLevels = false;
-    bool m_bMergeShaders = false;
-    bool m_bStatsShaderList = false;
-    bool m_bStatsShaders = false;
     //! In this mode editor will load specified cry file, export t, and then close.
     bool m_bExportMode = false;
     QString m_exportFile;