pyclbr: move to 2and3 (#1034)

* pyclbr: move to 2and3

This module is completely identical between 2 and 3 in CPython (apart from a small few syntax changes).

* fix typo

stdlib/3/pyclbr.pyi

@@ -1,40 +0,0 @@
-from typing import List, Union, Sequence, Optional, Dict
-
-
-class Class:
-    module = ...  # type: str
-    name = ...  # type: str
-    super = Optional[List[Union["Class", str]]]
-    methods = ...  # type: Dict[str, int]
-    file = ...  # type: int
-    lineno = ...  # type: int
-
-    def __init__(self,
-                 module: str,
-                 name: str,
-                 super: Optional[List[Union["Class", str]]],
-                 file: str,
-                 lineno: int) -> None: ...
-
-
-class Function:
-    module = ...  # type: str
-    name = ...  # type: str
-    file = ...  # type: int
-    lineno = ...  # type: int
-
-    def __init__(self,
-                 module: str,
-                 name: str,
-                 file: str,
-                 lineno: int) -> None: ...
-
-
-def readmodule(module: str,
-               path: Optional[Sequence[str]] = ...
-               ) -> Dict[str, Class]: ...
-
-
-def readmodule_ex(module: str,
-                  path: Optional[Sequence[str]] = ...
-                  ) -> Dict[str, Union[Class, Function, List[str]]]: ...