Fix node.statement overload typing (pylint-dev#1308)

Author: cdce8p

astroid/nodes/node_ng.py

@@ -272,9 +272,7 @@ def parent_of(self, node):
         return any(self is parent for parent in node.node_ancestors())
 
     @overload
-    def statement(
-        self, *, future: Literal[None] = ...
-    ) -> Union["nodes.Statement", "nodes.Module"]:
+    def statement(self) -> Union["nodes.Statement", "nodes.Module"]:
         ...
 
     @overload

astroid/nodes/scoped_nodes/scoped_nodes.py

@@ -658,9 +658,11 @@ def fully_defined(self):
         return self.file is not None and self.file.endswith(".py")
 
     @overload
-    def statement(self, *, future: Literal[None] = ...) -> "Module":
+    def statement(self) -> "Module":
         ...
 
+    # pylint: disable-next=arguments-differ
+    # https://github.com/PyCQA/pylint/issues/5264
     @overload
     def statement(self, *, future: Literal[True]) -> NoReturn:
         ...