update UI test

We no longer give suggestions; this is presumably related to the changes
I made in coercion. However, those suggestions appear to be wrong
anyhow!

src/test/ui/resolve/token-error-correct-3.stderr

@@ -36,10 +36,6 @@ error[E0308]: mismatched types
    |
    = note: expected type `()`
               found type `std::result::Result<bool, std::io::Error>`
-   = help: here are some functions which might fulfill your needs:
-           - .unwrap()
-           - .unwrap_err()
-           - .unwrap_or_default()
 
 error: aborting due to previous error