Issue #25002: Back out asyncore/asynchat deprecation.

Lib/asynchat.py

@@ -46,13 +46,8 @@ method) up to the terminator, and then control will be returned to
 you - by calling your self.found_terminator() method.
 """
 import asyncore
-import warnings
-
 from collections import deque
 
-warnings.warn(
-    'asynchat module is deprecated in 3.6. Use asyncio instead.',
-    PendingDeprecationWarning, stacklevel=2)
 
 class async_chat(asyncore.dispatcher):
     """This is an abstract class.  You must derive from this class, and add

Lib/asyncore.py

@@ -60,10 +60,6 @@ from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL, \
 _DISCONNECTED = frozenset({ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED, EPIPE,
                            EBADF})
 
-warnings.warn(
-    'asyncore module is deprecated in 3.6. Use asyncio instead.',
-    PendingDeprecationWarning, stacklevel=2)
-
 try:
     socket_map
 except NameError: