Fix ruff linting issues - remove unused imports

- Remove unused Literal import from collapsible.py
- Remove unused Any and Literal imports from collapsible.pyi
- Fixes pre-commit check failures in CI

Co-Authored-By: Carlos Cutillas <[email protected]>

Author: devin-ai-integration[bot]

reflex_ui/components/base/collapsible.py

@@ -1,6 +1,5 @@
 """Custom collapsible component."""
 
-from typing import Literal
 
 from reflex.components.component import Component, ComponentNamespace
 from reflex.event import EventHandler, passthrough_event_spec

reflex_ui/components/base/collapsible.pyi

@@ -1,6 +1,5 @@
 """Type stubs for collapsible component."""
 
-from typing import Any, Literal
 
 from reflex.components.component import Component, ComponentNamespace
 from reflex.event import EventType