refactor: Remove unused imports and add exception comments

Co-authored-by: jmiller-moko <230051081+jmiller-moko@users.noreply.github.com>

scripts/maintenance/release_version.py

@@ -27,13 +27,12 @@ NOTE: Updates CHANGELOG.md and optionally updates VERSION in files
 """
 
 import argparse
-import json
 import re
 import subprocess
 import sys
 from datetime import datetime
 from pathlib import Path
-from typing import List, Optional, Tuple
+from typing import List, Optional
 
 
 class VersionReleaser: