flake8

src/allmydata/scripts/admin.py

@@ -92,7 +92,7 @@ class AddGridManagerCertOptions(BaseOptions):
         try:
             self.certificate_data = parse_grid_manager_data(data)
         except ValueError as e:
-            raise UsageError(
+            raise usage.UsageError(
                 "Error parsing certificate: {}".format(e)
             )
 

src/allmydata/scripts/tahoe_grid_manager.py

@@ -2,7 +2,6 @@ from __future__ import print_function
 
 import sys
 import json
-import time
 from datetime import datetime, timedelta
 
 from allmydata.scripts.common import BaseOptions

src/allmydata/test/test_grid_manager.py

@@ -2,7 +2,6 @@
 import json
 
 from allmydata.client import (
-    _load_grid_manager_certificates,
     create_storage_farm_broker,
 )
 from allmydata.node import (