removed missing include reference

math/pdf/tests/TestPDF.cpp

@@ -25,8 +25,6 @@
 #include "core/vector/VVector.h"
 #include "vislearning/math/pdf/PDFGaussian.h"
 
-#include "objrec/nice_nonvis.h"
-
 using namespace std;
 using namespace NICE;
 using namespace OBJREC;