refactor: drop unused AlarmStyle re-export from styles package

Nothing imports AlarmStyle via the styles namespace (blink/simple both
import from styles.base directly), so the redundant-alias re-export was
dead weight that only existed to silence ruff F401.

styles/__init__.py

@@ -1,4 +1,3 @@
-from styles.base import AlarmStyle as AlarmStyle
 from styles.blink import BlinkStyle
 from styles.simple import SimpleStyle