fix flake8 failure

Signed-off-by: Trishna Guha <[email protected]>

lookup_plugins/network_template.py

@@ -245,7 +245,7 @@ def _coerce_to_native(self, value):
         if not isinstance(value, bool):
             try:
                 value = int(value)
-            except Exception as exc:
+            except Exception:
                 if value is None or len(value) == 0:
                     return None
         return value