ui: Remove old settings components (#15347)

This PR removes the old settings components, as they've been adapted
into other components for the settings UI.

Release Notes:

- N/A

crates/storybook/src/story_selector.rs

@@ -32,7 +32,6 @@ pub enum ComponentStory {
     OverflowScroll,
     Picker,
     Scroll,
-    Setting,
     Tab,
     TabBar,
     Text,
@@ -66,7 +65,6 @@ impl ComponentStory {
             Self::ListItem => cx.new_view(|_| ui::ListItemStory).into(),
             Self::OverflowScroll => cx.new_view(|_| crate::stories::OverflowScrollStory).into(),
             Self::Scroll => ScrollStory::view(cx).into(),
-            Self::Setting => cx.new_view(|cx| ui::SettingStory::init(cx)).into(),
             Self::Text => TextStory::view(cx).into(),
             Self::Tab => cx.new_view(|_| ui::TabStory).into(),
             Self::TabBar => cx.new_view(|_| ui::TabBarStory).into(),