Undeprecate auto_delete flag for exchanges.

It was undeprecated from AMQP.

See https://www.rabbitmq.com/amqp-0-9-1-errata.html#section_25

Fixes #286

amqp/channel.py

@@ -21,11 +21,6 @@
 
 AMQP_LOGGER = logging.getLogger('amqp')
 
-EXCHANGE_AUTODELETE_DEPRECATED = """\
-The auto_delete flag for exchanges has been deprecated and will be removed
-from py-amqp v1.5.0.\
-"""
-
 REJECTED_MESSAGE_WITHOUT_CALLBACK = """\
 Rejecting message with delivery tag %r for reason of having no callbacks.
 consumer_tag=%r exchange=%r routing_key=%r.\
@@ -613,9 +608,6 @@ def exchange_declare(self, exchange, type, passive=False, durable=False,
                 implementation.  This field is ignored if passive is
                 True.
         """
-        if auto_delete:
-            warn(VDeprecationWarning(EXCHANGE_AUTODELETE_DEPRECATED))
-
         self.send_method(
             spec.Exchange.Declare, argsig,
             (0, exchange, type, passive, durable, auto_delete,

t/unit/test_channel.py

@@ -148,12 +148,10 @@ def test_exchange_declare(self):
         )
 
     def test_exchange_declare__auto_delete(self):
-        with patch('amqp.channel.warn') as warn:
-            self.c.exchange_declare(
-                'foo', 'direct', False, True,
-                auto_delete=True, nowait=False, arguments={'x': 1},
-            )
-            warn.assert_called()
+        self.c.exchange_declare(
+            'foo', 'direct', False, True,
+            auto_delete=True, nowait=False, arguments={'x': 1},
+        )
 
     def test_exchange_delete(self):
         self.c.exchange_delete('foo')