Drop unused `as err`, suggest `logging.exception()`

skynet/ipfs/docker.py

@@ -63,6 +63,8 @@ def open_ipfs_node(
         if ec != 0:
             logging.error(out)
 
+    # TODO, why not deliver some kinda API here for controlling the
+    # ipfs node?
     yield
 
     if teardown and container:

skynet/ipfs/pinner.py

@@ -118,7 +118,8 @@ class SkynetPinner:
                     for cid in cids:
                         n.start_soon(self.task_pin, cid)
 
-                except OSError as e:
+                except OSError:
+                    # TODO, use `logging.exception()` here instead ??
                     traceback.print_exc()
 
                 except KeyboardInterrupt: