Removed some unused classes from Editor/Controls

Signed-off-by: Chris Galvan <chgalvan@amazon.com>

Code/Editor/IEditor.h

@@ -69,7 +69,6 @@ class CSelectionTreeManager;
 struct SEditorSettings;
 class CGameExporter;
 class IAWSResourceManager;
-struct IEditorPanelUtils;
 
 namespace WinWidget
 {
@@ -526,8 +525,6 @@ struct IEditor
     virtual IEditorMaterialManager* GetIEditorMaterialManager() = 0; // Vladimir@Conffx
     //! Returns IconManager.
     virtual IIconManager* GetIconManager() = 0;
-    //! Get Panel Editor Utilities
-    virtual IEditorPanelUtils* GetEditorPanelUtils() = 0;
     //! Get Music Manager.
     virtual CMusicManager* GetMusicManager() = 0;
     virtual float GetTerrainElevation(float x, float y) = 0;