Another batch of lint fixes (#36521)

- **Enable a bunch of extra lints**
- **First batch of fixes**
- **More fixes**

Release Notes:

- N/A

crates/repl/src/components/kernel_options.rs

@@ -269,10 +269,9 @@ where
         };
 
         let picker_view = cx.new(|cx| {
-            let picker = Picker::uniform_list(delegate, window, cx)
+            Picker::uniform_list(delegate, window, cx)
                 .width(rems(30.))
-                .max_height(Some(rems(20.).into()));
-            picker
+                .max_height(Some(rems(20.).into()))
         });
 
         PopoverMenu::new("kernel-switcher")