remove unused exception instance variables

Author: Vetoshkin Nikita

kafka/consumer.py

@@ -299,7 +299,7 @@ def get_messages(self, count=1, block=True, timeout=0.1):
             while count > 0:
                 try:
                     messages.append(next(iterator))
-                except StopIteration as exp:
+                except StopIteration:
                     break
                 count -= 1
 

kafka/producer.py

@@ -112,7 +112,7 @@ def _send_upstream(self, queue):
             try:
                 self.client.send_produce_request(reqs, acks=self.req_acks,
                                                  timeout=self.ack_timeout)
-            except Exception as exp:
+            except Exception:
                 log.error("Error sending message", exc_info=sys.exc_info())
 
     def send_messages(self, partition, *msg):