chore: Bump Rust to 1.89 (#35788)

Release Notes:

- N/A

---------

Co-authored-by: Julia Ryan <juliaryan3.14@gmail.com>

crates/gpui/src/platform/windows/wrapper.rs

@@ -1,28 +1,6 @@
 use std::ops::Deref;
 
-use windows::Win32::{Foundation::HANDLE, UI::WindowsAndMessaging::HCURSOR};
-
-#[derive(Debug, Clone, Copy)]
-pub(crate) struct SafeHandle {
-    raw: HANDLE,
-}
-
-unsafe impl Send for SafeHandle {}
-unsafe impl Sync for SafeHandle {}
-
-impl From<HANDLE> for SafeHandle {
-    fn from(value: HANDLE) -> Self {
-        SafeHandle { raw: value }
-    }
-}
-
-impl Deref for SafeHandle {
-    type Target = HANDLE;
-
-    fn deref(&self) -> &Self::Target {
-        &self.raw
-    }
-}
+use windows::Win32::UI::WindowsAndMessaging::HCURSOR;
 
 #[derive(Debug, Clone, Copy)]
 pub(crate) struct SafeCursor {