correcting duplicate EAGAIN handling

Author: calcut

adafruit_minimqtt/adafruit_minimqtt.py

@@ -892,9 +892,6 @@ def _wait_for_msg(self, timeout=0.1):
                 if error.errno in (errno.ETIMEDOUT, errno.EAGAIN):
                     # raised by a socket timeout if 0 bytes were present
                     return None
-                if error.errno == errno.EAGAIN:
-                    # there is no data available right now, try again later
-                    return None
                 raise MMQTTException from error
 
         # Block while we parse the rest of the response