remove obsolete comment

Change-Id: I0b241b61f300fb3ed25b74595c3f8a7d018105b6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/152186
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/unomod.hxx

@@ -42,7 +42,7 @@ protected:
     // not too hard to asl a UnoModel to hand back a DrawingLayer Model in the
     // form of an SdrModel. Thus, returning a reference and make usages
     // safer and easier is justified.
-    virtual SdrModel& getSdrModelFromUnoModel() const = 0; //TTTT make reference return
+    virtual SdrModel& getSdrModelFromUnoModel() const = 0;
 
 public:
     SvxUnoDrawMSFactory() noexcept {};