Fix: Do not assign exception. (Redmine issue: #7563)

lib/mentat/services/pdnsr.py

@@ -118,7 +118,7 @@ class PDNSRService:
         # Send request
         try:
             resp = requests.get(url)
-        except Exception as exc:
+        except Exception:
             raise PDNSRRuntimeException(
                 "Can't get data from PassiveDNS service: {}ip/{}".format(self.base_api_url, str(ipaddr))
             )