remove incorrect call up to base destructor method

panda/src/glstuff/glGraphicsStateGuardian_src.cxx

@@ -278,8 +278,6 @@ CLP(GraphicsStateGuardian)::
     delete _stencil_render_states;
     _stencil_render_states = 0;
   }
-
-  GraphicsStateGuardian::~GraphicsStateGuardian();
 }
 
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