remove commented out code in ofShadow.h (#8441)

Author: NickHardeman

libs/openFrameworks/gl/ofShadow.h

@@ -307,11 +307,4 @@ class ofShadow {
 
 };
 
-//namespace of{
-//namespace priv{
-///// \brief Function for storing all of the ofShadows data.
-//std::vector<std::weak_ptr<ofShadowData> > & ofShadowsData();
-//}
-//}
-