bitbake: bitbake: Drop older python version compatibility code

cooker: We can call multiprocessing close() unconditionally and tweak a
comment give 3.8 is now the minimum version.

lib/bb: We can drop the logger addition code only needed before 3.6

asyncrpc/hashserv: Since the minimum version is 3.8, we can drop the
conditional code.

(Bitbake rev: 16f4386400f88ba50605307961c248bef09895c1)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/__init__.py

@@ -104,26 +104,6 @@ class BBLoggerAdapter(logging.LoggerAdapter, BBLoggerMixin):
         self.setup_bblogger(logger.name)
         super().__init__(logger, *args, **kwargs)
 
-    if sys.version_info < (3, 6):
-        # These properties were added in Python 3.6. Add them in older versions
-        # for compatibility
-        @property
-        def manager(self):
-            return self.logger.manager
-
-        @manager.setter
-        def manager(self, value):
-            self.logger.manager = value
-
-        @property
-        def name(self):
-            return self.logger.name
-
-        def __repr__(self):
-            logger = self.logger
-            level = logger.getLevelName(logger.getEffectiveLevel())
-            return '<%s %s (%s)>' % (self.__class__.__name__, logger.name, level)
-
 logging.LoggerAdapter = BBLoggerAdapter
 
 logger = logging.getLogger("BitBake")