ui: Remove ToolStrip component (#24529)

This PR removes the `ToolStrip` component.

Pulling this change out of
https://github.com/zed-industries/zed/pull/24456.

Release Notes:

- N/A

crates/ui/src/components/stories.rs

@@ -15,7 +15,6 @@ mod list_item;
 mod tab;
 mod tab_bar;
 mod toggle_button;
-mod tool_strip;
 
 pub use avatar::*;
 pub use button::*;
@@ -31,4 +30,3 @@ pub use list_item::*;
 pub use tab::*;
 pub use tab_bar::*;
 pub use toggle_button::*;
-pub use tool_strip::*;