ci: drop two unused imports caught by ruff in CI

Author: WaylandYang

src/dcp/bridge.py

@@ -12,7 +12,7 @@
 
 from dcp.manifest import Manifest
 from dcp.safety import SafetyError, check_call
-from dcp.tokens import Token, TokenError, verify as verify_token
+from dcp.tokens import Token, verify as verify_token
 from dcp.transports.base import Transport
 from dcp.wire import Frame, Kind
 

src/dcp/codegen.py

@@ -12,7 +12,6 @@
 import hashlib
 import re
 from pathlib import Path
-from textwrap import dedent
 
 from dcp.manifest import Manifest
 from dcp.wire import intent_id