fix Coverity issues

src/Mod/Part/App/GeometryCurvePyImp.cpp

@@ -464,9 +464,6 @@ PyObject* GeometryCurvePy::makeRuledSurface(PyObject *args)
         PyErr_SetString(PartExceptionOCCError, e->GetMessageString());
         return 0;
     }
-
-    PyErr_SetString(PartExceptionOCCError, "Geometry is not a curve");
-    return 0;
 }
 
 PyObject* GeometryCurvePy::intersect2d(PyObject *args)