removed python_cext.py

Author: tomasstupka

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/Python3Core.java

@@ -360,7 +360,6 @@ private static String[] initializeCoreFiles() {
                         "__graalpython__",
                         "_weakref",
                         "faulthandler",
-                        PythonCextBuiltins.PYTHON_CEXT,
                         "bytearray",
                         "unicodedata",
                         "_sre",

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextBuiltins.java

@@ -295,17 +295,13 @@ public final class PythonCextBuiltins extends PythonBuiltins {
 
     public static final String PYTHON_CEXT = "python_cext";
 
-    public static final String NATIVE_NULL = "native_null";
-
     /*
      * Native pointer to the PyMethodDef struct for functions created in C. We need to keep it
      * because the C program may expect to get its pointer back when accessing m_ml member of
      * methods.
      */
     public static final HiddenKey METHOD_DEF_PTR = new HiddenKey("method_def_ptr");
 
-    private PythonObject errorHandler;
-
     @Override
     protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
         return PythonCextBuiltinsFactory.getFactories();
@@ -314,8 +310,6 @@ protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFa
     @Override
     public void initialize(Python3Core core) {
         super.initialize(core);
-        // TODO can be removed when python_cext.py is gone
-        builtinConstants.put(NATIVE_NULL, core.getContext().getNativeNull());
         builtinConstants.put("PyEval_SaveThread", new PyEvalSaveThread());
         builtinConstants.put("PyEval_RestoreThread", new PyEvalRestoreThread());
         builtinConstants.put("PyGILState_Ensure", new PyGILStateEnsure());