remove test_pgraph.cxx

panda/src/pgraph/pgraph_composite2.cxx

@@ -35,7 +35,6 @@
 #include "showBoundsEffect.cxx"
 #include "spotlight.cxx"
 #include "switchNode.cxx"
-#include "test_pgraph.cxx"
 #include "texMatrixAttrib.cxx"
 #include "texProjectorEffect.cxx"
 #include "textureApplyAttrib.cxx"