Fix F401 linter errors: Remove unused imports

Co-authored-by: kevinbackhouse <4358136+kevinbackhouse@users.noreply.github.com>

Author: Copilot

pyproject.toml

@@ -168,7 +168,6 @@ ignore = [
   "E741",     # Ambiguous variable name
   "EM101",    # Exception string literal
   "EM102",    # Exception f-string
-  "F401",     # Unused import
   "F541",     # f-string without placeholders
   "F811",     # Redefinition of unused name
   "F821",     # Undefined name

src/seclab_taskflow_agent/mcp_servers/codeql/jsonrpyc/__init__.py

@@ -3,15 +3,14 @@
 
 __all__: list[str] = []
 
-import io
 import json
 import os
 import re
 import sys
 import threading
 import time
 from collections.abc import Callable
-from typing import Any, Optional, Protocol, Type, TypeAlias
+from typing import Any, Protocol, TypeAlias
 
 # package infos
 from .__meta__ import (  # noqa