fix: remove unnecessary state

Author: damassi

src/agent_chat_cli/app.py

@@ -35,7 +35,6 @@ def __init__(self) -> None:
         self.message_bus = MessageBus(app=self)
         self.actions = Actions(app=self)
         self.agent_loop = AgentLoop(app=self)
-        self.pending_tool_permission: dict | None = None
 
     def compose(self) -> ComposeResult:
         with VerticalScroll():