Remove useless sleep on test_seek. (#154)

tests/pulsar_test.py

diff --git a/tests/pulsar_test.py b/tests/pulsar_test.py
index d14d39c..067855d 100755
--- a/tests/pulsar_test.py
+++ b/tests/pulsar_test.py
@@ -977,19 +977,16 @@
 
         # seek, and after reconnect, expected receive first message.
         consumer.seek(MessageId.earliest)
-        time.sleep(0.5)
         msg = consumer.receive(TM)
         self.assertEqual(msg.data(), b"hello-0")
 
         # seek on messageId
         consumer.seek(ids[50])
-        time.sleep(0.5)
         msg = consumer.receive(TM)
         self.assertEqual(msg.data(), b"hello-51")
 
         # ditto, but seek on timestamp
         consumer.seek(timestamps[42])
-        time.sleep(0.5)
         msg = consumer.receive(TM)
         self.assertEqual(msg.data(), b"hello-42")
 
@@ -1000,7 +997,6 @@
 
         # earliest
         reader.seek(MessageId.earliest)
-        time.sleep(0.5)
         msg = reader.read_next(TM)
         self.assertEqual(msg.data(), b"hello-0")
         msg = reader.read_next(TM)
@@ -1008,7 +1004,6 @@
 
         # seek on messageId
         reader.seek(ids[33])
-        time.sleep(0.5)
         msg = reader.read_next(TM)
         self.assertEqual(msg.data(), b"hello-34")
         msg = reader.read_next(TM)
@@ -1016,7 +1011,6 @@
 
         # seek on timestamp
         reader.seek(timestamps[79])
-        time.sleep(0.5)
         msg = reader.read_next(TM)
         self.assertEqual(msg.data(), b"hello-79")
         msg = reader.read_next(TM)