Fix CI (#4270)

* Fix typos
* Remove OsError in winit-web

winit-web/src/error.rs

@@ -1,10 +0,0 @@
-use std::fmt;
-
-#[derive(Debug)]
-pub struct OsError(pub String);
-
-impl fmt::Display for OsError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}

winit-web/src/lib.rs

@@ -68,7 +68,6 @@ macro_rules! os_error {
 
 mod r#async;
 mod cursor;
-mod error;
 mod event;
 pub(crate) mod event_loop;
 mod keyboard;