bitbake: lib/pyinotify.py: Remove deprecated module asyncore

When build with nativesdk-python3 (3.10) from buildtools:
/path/to/bitbake/lib/pyinotify.py:55: DeprecationWarning: The asyncore module is deprecated. The recommended replacement is asyncio

The pyinotify.py's upstream didn't have any update in recent 7 years:
https://github.com/seb-m/pyinotify

And bitbake doesn't use the asyncore module, so remove the related code.

(Bitbake rev: 58fbb01c3e2111bef4f79f88e1aac1827350c82a)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/pyinotify.py

@@ -52,7 +52,6 @@ from collections import deque
 from datetime import datetime, timedelta
 import time
 import re
-import asyncore
 import glob
 import locale
 import subprocess
@@ -1475,35 +1474,6 @@ class ThreadedNotifier(threading.Thread, Notifier):
         self.loop()
 
 
-class AsyncNotifier(asyncore.file_dispatcher, Notifier):
-    """
-    This notifier inherits from asyncore.file_dispatcher in order to be able to
-    use pyinotify along with the asyncore framework.
-
-    """
-    def __init__(self, watch_manager, default_proc_fun=None, read_freq=0,
-                 threshold=0, timeout=None, channel_map=None):
-        """
-        Initializes the async notifier. The only additional parameter is
-        'channel_map' which is the optional asyncore private map. See
-        Notifier class for the meaning of the others parameters.
-
-        """
-        Notifier.__init__(self, watch_manager, default_proc_fun, read_freq,
-                          threshold, timeout)
-        asyncore.file_dispatcher.__init__(self, self._fd, channel_map)
-
-    def handle_read(self):
-        """
-        When asyncore tells us we can read from the fd, we proceed processing
-        events. This method can be overridden for handling a notification
-        differently.
-
-        """
-        self.read_events()
-        self.process_events()
-
-
 class TornadoAsyncNotifier(Notifier):
     """
     Tornado ioloop adapter.