diff --git a/archivebox/core/settings.py b/archivebox/core/settings.py
index 3417beb2..28a3e1fe 100644
--- a/archivebox/core/settings.py
+++ b/archivebox/core/settings.py
@@ -25,7 +25,6 @@ IS_SHELL = 'shell' in sys.argv[:3] or 'shell_plus' in sys.argv[:3]
 ### Django Core Settings
 ################################################################################
 
-DEBUG = True
 WSGI_APPLICATION = 'core.wsgi.application'
 ROOT_URLCONF = 'core.urls'
 
diff --git a/archivebox/extractors/mercury.py b/archivebox/extractors/mercury.py
index 5fec1961..741c3291 100644
--- a/archivebox/extractors/mercury.py
+++ b/archivebox/extractors/mercury.py
@@ -3,7 +3,7 @@ __package__ = 'archivebox.extractors'
 from pathlib import Path
 
 from subprocess import CompletedProcess
-from typing import Optional, Tuple, List
+from typing import Optional, List
 import json
 
 from ..index.schema import Link, ArchiveResult, ArchiveError
diff --git a/archivebox/logging_util.py b/archivebox/logging_util.py
index 1a81fd79..1c92eba2 100644
--- a/archivebox/logging_util.py
+++ b/archivebox/logging_util.py
@@ -4,7 +4,6 @@ import re
 import os
 import sys
 import time
-import platform
 import argparse
 from math import log
 from multiprocessing import Process