removed obsolete commented out code

code/glTFExporter.h

@@ -55,17 +55,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 struct aiScene;
 struct aiNode;
 struct aiMaterial;
-// struct aiMesh;
 
 namespace glTF
 {
     class Asset;
-
     struct TexProperty;
-
-    // class Ref;
-
-    // struct Mesh;
 }
 
 namespace Assimp
@@ -107,7 +101,6 @@ namespace Assimp
         unsigned int ExportNode(const aiNode* node);
         void ExportScene();
         void ExportAnimations();
-        // void ExportSkins(const aiMesh* aim, glTF::Ref<glTF::Mesh>& m);
     };
 
 }