python: fix flake8 warnings

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6bcc6c72e1855c7de7c8b1e88cbab01e92b4070d
diff --git a/scripts/update_schemas.py b/scripts/update_schemas.py
index 7f91496..da9c346 100755
--- a/scripts/update_schemas.py
+++ b/scripts/update_schemas.py
@@ -2,12 +2,11 @@
 import requests
 import zipfile
 from io import BytesIO
-from packaging.version import Version, parse
+from packaging.version import parse
 
 import os
 from collections import OrderedDict, defaultdict
 import shutil
-import json
 
 import xml.etree.ElementTree as ET