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/Framework/AzToolsFramework/AzToolsFramework/API/ToolsApplicationAPI.h

@@ -761,16 +761,6 @@ namespace AzToolsFramework
         /// If the view pane was not registered with the ViewPaneOptions.isDeletable set to true, the view pane will be hidden instead.
         virtual void CloseViewPane(const char* /*paneName*/) {}
 
-        /// Request generation of all level cubemaps.
-        virtual void GenerateAllCubemaps() {}
-
-        /// Regenerate cubemap for a particular entity.
-        /// \param entityId ID of the entity that the cubemap is for
-        /// \param cubemapOutputPath path to a image file to generate
-        /// \param hideEntity Indicates whether the entity should be hidden during cubemap generation. Controls whether the entity's current cubemap output is baked into the new cubemap.
-        virtual void GenerateCubemapForEntity(AZ::EntityId /*entityId*/, AZStd::string* /*cubemapOutputPath*/, bool /*hideEntity*/) {}
-        virtual void GenerateCubemapWithIDForEntity(AZ::EntityId /*entityId*/, AZ::Uuid /*cubemapId*/, AZStd::string* /*cubemapOutputPath*/, bool /*hideEntity*/, bool /*hasCubemapId*/) {}
-
         //! Spawn asset browser for the appropriate asset types.
         virtual void BrowseForAssets(AssetBrowser::AssetSelectionModel& /*selection*/) = 0;