Remove ChannelError.__repr__ in favor of __str__ (#3098)

See PR #1966 for more context

Author: benclifford

parsl/channels/errors.py

@@ -14,11 +14,8 @@ def __init__(self, reason: str, e: Exception, hostname: str) -> None:
         self.e = e
         self.hostname = hostname
 
-    def __repr__(self) -> str:
-        return "Hostname:{0}, Reason:{1}".format(self.hostname, self.reason)
-
     def __str__(self) -> str:
-        return self.__repr__()
+        return "Hostname:{0}, Reason:{1}".format(self.hostname, self.reason)
 
 
 class BadHostKeyException(ChannelError):