feat: remove power monitoring feature

tests/test_bot.py

@@ -82,7 +82,6 @@ async def wait_reply(fake: FakeOneBotClient, timeout: float = 30) -> str:
 @pytest.mark.asyncio
 @pytest.mark.parametrize("cmd,expect", [
     ("状态", "服务器状态"),
-    ("功耗", "功耗"),
     ("top", "TOP10"),
     ("温度", "温度"),
     ("网络", "网络速率"),