Merge Python 2 and 3 wsgiref (#2106)

* Merge Python 2 and 3 wsgiref

* Move wsigref to 2and3

stdlib/3/wsgiref/types.pyi

@@ -1,34 +0,0 @@
-# Type declaration for a WSGI Function in Python 3
-#
-# wsgiref/types.py doesn't exist and neither does WSGIApplication, it's a type
-# provided for type checking purposes.
-#
-# This means you cannot simply import wsgiref.types in your code. Instead,
-# use the `TYPE_CHECKING` flag from the typing module:
-#
-#   from typing import TYPE_CHECKING
-#
-#   if TYPE_CHECKING:
-#       from wsgiref.types import WSGIApplication
-#
-# This import is now only taken into account by the type checker. Consequently,
-# you need to use 'WSGIApplication' and not simply WSGIApplication when type
-# hinting your code.  Otherwise Python will raise NameErrors.
-
-from typing import Callable, Dict, Iterable, List, Optional, Tuple, Type, Union, Any
-from types import TracebackType
-
-_exc_info = Tuple[Optional[Type[BaseException]],
-                  Optional[BaseException],
-                  Optional[TracebackType]]
-WSGIEnvironment = Dict[str, Any]
-WSGIApplication = Callable[
-    [
-        WSGIEnvironment,
-        Union[
-            Callable[[str, List[Tuple[str, str]]], Callable[[Union[bytes, str]], None]],
-            Callable[[str, List[Tuple[str, str]], _exc_info], Callable[[Union[bytes, str]], None]]
-        ]
-    ],
-    Iterable[Union[bytes, str]]
-]

stdlib/3/wsgiref/validate.pyi

@@ -1,43 +0,0 @@
-from typing import Any
-
-class WSGIWarning(Warning): ...
-
-def validator(application): ...
-
-class InputWrapper:
-    input = ...  # type: Any
-    def __init__(self, wsgi_input): ...
-    def read(self, *args): ...
-    def readline(self, *args): ...
-    def readlines(self, *args): ...
-    def __iter__(self): ...
-    def close(self): ...
-
-class ErrorWrapper:
-    errors = ...  # type: Any
-    def __init__(self, wsgi_errors): ...
-    def write(self, s): ...
-    def flush(self): ...
-    def writelines(self, seq): ...
-    def close(self): ...
-
-class WriteWrapper:
-    writer = ...  # type: Any
-    def __init__(self, wsgi_writer): ...
-    def __call__(self, s): ...
-
-class PartialIteratorWrapper:
-    iterator = ...  # type: Any
-    def __init__(self, wsgi_iterator): ...
-    def __iter__(self): ...
-
-class IteratorWrapper:
-    original_iterator = ...  # type: Any
-    iterator = ...  # type: Any
-    closed = ...  # type: Any
-    check_start_response = ...  # type: Any
-    def __init__(self, wsgi_iterator, check_start_response): ...
-    def __iter__(self): ...
-    def __next__(self): ...
-    def close(self): ...
-    def __del__(self): ...